fix: Update scam token warning

[gambinish]

Description

This PR updates the scam warning to be less aggressive and to also include a suggested ticker symbol.

I also took the opportunity to remove the redundant MATIC chain collision check, which is no longer needed since the remote chain list has been updated upstream.

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/MMASSETS-384

Manual testing steps

Add a custom network, with a custom/incorrect ticker (try adding Polygon with MATIC ticker)

Scam warning on token list page should reflect new copy from ticket.

Screenshots/Recordings

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

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[sonarcloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[metamaskbot]

Builds ready [17e18a8]

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Page Load Metrics (2010 ± 91 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1728	2453	2001	202	97
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Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 514 Bytes (0.01%)
• common: 248 Bytes (0.00%)

[metamaskbot]

Builds ready [cd931f8]

• builds: chrome, firefox
• builds (beta): chrome
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• builds (test): chrome, firefox
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• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
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Page Load Metrics (1778 ± 127 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1488	2625	1781	274	131
		domContentLoaded	1476	2541	1758	265	127
		load	1485	2553	1778	265	127
		domInteractive	14	79	40	16	8

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 514 Bytes (0.01%)
• common: 241 Bytes (0.00%)

[metamaskbot]

Builds ready [e43b0fc]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
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  • background: 0, 1, 2, 3, 4, 5, 6
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  • content-script: 0
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Page Load Metrics (1810 ± 118 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1593	2829	1822	254	122
		domContentLoaded	1579	2799	1788	249	120
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Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 614 Bytes (0.01%)
• common: 241 Bytes (0.00%)

[legobeat]

LGTM

[metamaskbot]

Builds ready [1307375]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
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  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
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Page Load Metrics (1800 ± 60 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1588	2081	1809	128	61
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		load	1589	2100	1800	124	60
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Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 679 Bytes (0.01%)
• common: 241 Bytes (0.00%)

[vinnyhoward]

LGTM!🟢

[sonarcloud]

Quality Gate failed

Failed conditions
78.6% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud

[metamaskbot]

Builds ready [3bfabac]

• builds: chrome, firefox
• builds (beta): chrome
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• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6
  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
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Page Load Metrics (2126 ± 56 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	277	2271	1848	654	314
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Bundle size diffs [🚨 Warning! Bundle size has increased!]

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• ui: 679 Bytes (0.01%)
• common: 241 Bytes (0.00%)