Fix: WalletConnect - track only tx and signature requests

[katspaugh]

What it solves

WalletConnect RPC request tracking was added in #2717.
This PR limits the types of requests being tracked to only transaction and signature requests. Otherwise we would track all kinds of "read-only" requests like eth_getChainid etc.

Also, track errors only once when they are thrown, not every time they're shown.

[github-actions]

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ESLint Summary View Full Report

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Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

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^{Report generated by eslint-plus-action}

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	75.18% (-0% 🔻)	9462/12586
🔴	Branches	49.48% (-0.01% 🔻)	1935/3911
🔴	Functions	57.92% (+0.02% 🔼)	1423/2457
🟡	Lines	76.85% (+0% 🔼)	8567/11147

Show new covered files 🐣

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / tracking.ts	85.71%	0%	100%	83.33%

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / walletconnect.ts	75% (-25% 🔻)	100%	100%	100%

Test suite run success

1046 tests passing in 143 suites.

Report generated by 🧪jest coverage report action from e3710c2

[liliya-soroka]

Confirmed:

This PR limits the types of requests being tracked to only transaction and signature requests. Otherwise we would track all kinds of "read-only" requests like eth_getChainid etc. - "WC request" appears only on tx triggering from the connect dapp on web UI

Also, track errors only once when they are thrown, not every time they're shown. - confirmed