fix: pending skeletons + indexing statuses

[iamacook]

What it solves

Resolves (1) duplicate skeletons on queue and (2) hidden "Execute transaction" checkbox.

How this PR fixes it

1. The pending transactions TxPage does no longer skeletons. There are two network requests on the page (for pending and queued transactions) which otherwise show their own skeletons.
2. Transactions are no longer marked as pending if they are indexed. (This needs to be refactored). We did not previously encounter this bug as we weren't checking the presence of pending transactions.

How to test it

1. Queue a transaction and switch back and forth between the History and Queue. Observe no duplicate skeleton above the queued transaction.
2. Create and execute a transaction on a 1/n Safe. Create a new transaction and observe the "Execute transaction" checkbox on the review step.

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

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https://pending_skeleton--webcore.review-web-core.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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^{Report generated by eslint-plus-action}

[francovenica]

LGTM
The skeleton was removed
The execute now button shows now for tx 1/x. Checked tx rejection, replacement and safes 2/x for the last owner signature as well

[schmanu]

🚀🚀