feat: integrate multichain assets rates controller to extension UI

[salimtb]

Description

This PR aims to integrate the new multichainAssetsRatesControllers into the extension. To achieve this, an upgrade of the assets controller to version 49 is required. As a result, the target branch is set accordingly:
MetaMask PR #30250.

Related issues

Fixes:

Manual testing steps

1. open a flask build and add a solana account
2. check if the polling for the rates is running

Screenshots/Recordings

Before

After

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]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[GuillaumeRx]

Looking good 💯

[GuillaumeRx]

You need to omit this state key from sentry

resolved

[metamaskbot]

Builds ready [04ae981]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1883 ± 64 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1642	2150	1881	129	62
		domContentLoaded	1580	2114	1848	128	62
		load	1643	2153	1883	133	64
		domInteractive	25	124	46	28	13
		backgroundConnect	10	70	30	20	10
		firstReactRender	16	75	33	23	11
		getState	6	59	24	21	10
		initialActions	0	45	2	10	5
		loadScripts	1136	1603	1370	109	52
		setupStore	8	59	19	17	8
		uiStartup	1856	2333	2135	141	68

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

• background: 1.33 KiB (0.02%)
• ui: 0 Bytes (0.00%)
• common: 49 Bytes (0.00%)