fix (cherry-pick): remove reliance on transaction decode in confirmations #29341

[matthewwalsh0]

Description

Cherry-pick of #29341 for release 12.10.0.

Related issues

Manual testing steps

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.

[metamaskbot]

Builds ready [7af9f60]

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

Page Load Metrics (1677 ± 74 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1487	2194	1683	151	72
		domContentLoaded	1422	2172	1644	153	74
		load	1431	2197	1677	154	74
		domInteractive	24	88	44	24	11
		backgroundConnect	10	99	34	28	14
		firstReactRender	16	70	31	22	10
		getState	5	87	19	21	10
		initialActions	0	1	0	0	0
		loadScripts	1069	1696	1229	125	60
		setupStore	6	64	11	12	6
		uiStartup	1666	2473	1917	199	96

Bundle size diffs [🚀 Bundle size reduced!]

• background: 3 Bytes (0.00%)
• ui: -1008 Bytes (-0.01%)
• common: -160 Bytes (-0.00%)