fix: [cherry-pick][12.5.0] bump message signing snap

[matteoscurati]

Description

Bumps @metamask/message-signing-snap to 0.4.0 to allow portfolio to support automatic connections.

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/NOTIFY-1136

Manual testing steps

This does not effect anything within the wallet.

Screenshots/Recordings

Before

N/A

After

N/A

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.

[socket-security]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/@metamask/message-signing-snap@0.4.0	None	0	232 kB	metamaskbot
npm/@metamask/rpc-errors@6.4.0	None	+1	860 kB	metamaskbot
npm/@metamask/selected-network-controller@18.0.2	None	+2	482 kB	metamaskbot
npm/zod@3.23.8	None	0	667 kB	colinmcd94

🚮 Removed packages: npm/@metamask/message-signing-snap@0.3.3, npm/@metamask/rpc-errors@6.3.1, npm/@metamask/selected-network-controller@18.0.1, npm/zod@3.22.4

View full report↗︎

[metamaskbot]

Builds ready [4adfd8d]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

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

Page Load Metrics (1862 ± 75 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	244	2172	1793	380	182
		domContentLoaded	1583	2111	1838	144	69
		load	1586	2169	1862	157	75
		domInteractive	17	227	47	46	22