chore: Improvements to codeowners

[desi]

• Extension Devs is no longer in use so removing
• Sometime back the security team asked that we have a group who would be responsible for being mindful of security concerns as it relates to things like our CI pipeline. We needed a quick fix for that and so the library admins group was selected but it should really be a group that is best suited for that responsibility so we have created a new group reflecting that here and have added them as code owners for those areas.
• Kumavis showing with the lock icon regularly was confusing for folks so we have removed them as a specific code owner

Description

Related issues

Fixes:

Manual testing steps

1. Go to this page...

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.

[Gudahtt]

LGTM!

[metamaskbot]

Builds ready [3872193]

• 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, 7
  • 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 (1790 ± 87 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1503	2242	1794	189	91
		domContentLoaded	1495	2088	1756	154	74
		load	1504	2242	1790	180	87
		domInteractive	23	68	37	15	7
		backgroundConnect	8	184	30	39	19
		firstReactRender	15	24	17	3	1
		getState	82	478	142	79	38
		initialActions	0	0	0	0	0
		loadScripts	1111	1636	1336	149	71
		setupStore	6	26	9	5	2
		uiStartup	1764	2860	2053	250	120

Bundle size diffs

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