Refactor: migrate the relay API

[katspaugh]

What it solves

Resolves #3351

How this PR fixes it

I've replaced the old API calls with the new Gateway functions.

[github-actions]

Branch preview

✅ Deploy successful!

https://relay--walletweb.review-wallet-web.5afe.dev/home?safe=eth:0xA77DE01e157f9f57C7c4A326eeE9C4874D0598b6

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

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]

📦 Next.js Bundle Analysis for safe-wallet-web

This analysis was generated by the Next.js Bundle Analysis action. 🤖

🎉 Global Bundle Size Decreased

Page	Size (compressed)
global	997.53 KB (🟢 -121 B)

Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!

Seven Pages Changed Size

The following pages changed size from the code in this PR compared to its base branch:

Page	Size (compressed)	First Load
/apps/open	78.51 KB (🟡 +36 B)	1.05 MB
/new-safe/create	35.25 KB (🟡 +7 B)	1.01 MB
/transactions	103.79 KB (🟡 +36 B)	1.08 MB
/transactions/history	103.76 KB (🟡 +36 B)	1.08 MB
/transactions/messages	63.37 KB (🟡 +36 B)	1.04 MB
/transactions/queue	59.07 KB (🟡 +36 B)	1.03 MB
/transactions/tx	48.41 KB (🟡 +36 B)	1.02 MB

Details

Only the gzipped size is provided here based on an expert tip.

First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

Next to the size is how much the size has increased or decreased compared with the base branch of this PR. If this percentage has increased by 20% or more, there will be a red status indicator applied, indicating that special attention should be given to this.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	79.12% (-0.02% 🔻)	11186/14138
🔴	Branches	58.57% (-0.11% 🔻)	2652/4528
🟡	Functions	66.03% (-0.02% 🔻)	1802/2729
🟢	Lines	80.41% (-0.02% 🔻)	10079/12535

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🔴	... / dispatch.ts	40.56% (+0.33% 🔼)	40% (-3.48% 🔻)	30%	39.88% (+0.36% 🔼)
🟡	... / index.ts	69.67%	59.09% (-3.41% 🔻)	47.06%	68.87%

Test suite run success

1419 tests passing in 198 suites.

Report generated by 🧪jest coverage report action from be5c868

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

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]

I tested in sepolia since GNO is only in the prod cgw.

I tried several transaction with different wallets and different safe policies using and not using the relayer
I run out of relayer uses both in tx and safe creation
Check the relayer attempts work per safe. Also per owner in the safe creation

LGTM