fix: Disable submit button for non-owners

[usame-algan]

What it solves

Part of #2067

How this PR fixes it

• Adds the non-owner check back when executing a tx

How to test it

1. Open a Safe
2. Create a new transaction
3. Swich to a non-owner wallet
4. Observe the Submit button is disabled and an error is shown
5. Switch to signing
6. Observe the Submit button is disabled and an error is shown
7. Go to a fully signed tx in the queue as a non-owner
8. Press the execute button
9. Observe the Submit button is enabled

Screenshots

Checklist

• I've tested the branch on mobile 📱
• I've documented how it affects the analytics (if at all) 📊
• I've written a unit/e2e test for it (if applicable) 🧑‍💻

[github-actions]

Branch preview

✅ Deploy successful!

https://disable_submit--walletweb.review-wallet-web.5afe.dev

[github-actions]

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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