refactor: Expose E2E Chrome driver extension ID

[Gudahtt]

Description

The extensionId property was accidentally omitted by the ChromeDriver builder. This was an old mistake, made in #7690. You can see this property is expected in test/e2e/webdriver/index.js, though in practice we don't use this extensionId for anything right now.

This was fixed so that we could use the extensionId in the future if necessary. This was extracted from #27782, which used this ID in some API spec e2e test helpers.

Related issues

Extracted from #27782

Manual testing steps

N/A

Screenshots/Recordings

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.

[metamaskbot]

Builds ready [50d5b76]

• 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, 8
  • 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 (1738 ± 76 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1444	2261	1739	157	75
		domContentLoaded	1436	2246	1708	160	77
		load	1445	2266	1738	158	76
		domInteractive	25	79	34	12	6
		backgroundConnect	10	78	32	20	10
		firstReactRender	14	72	28	19	9
		getState	6	60	17	17	8
		initialActions	0	1	0	0	0
		loadScripts	983	1714	1241	146	70
		setupStore	7	73	29	24	11
		uiStartup	1777	2592	2012	170	82

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)