FEAT: Update what's new and settings copy to communicate additional network coverage on extension

[segun]

Description

• What's new copy should be updated to:

Steer clear of known scams while still preserving your privacy with security alerts powered by Blockaid. This feature is available on Arbitrum, Avalanche, BNB chain, Ethereum Mainnet, Linea, Optimism and Polygon.

Always do your own due diligence before approving requests.

• Settings copy should be updated to:

Privacy preserving - no data is shared with third parties. Available on Arbitrum, Avalanche, BNB chain, Ethereum Mainnet, Linea, Optimism and Polygon.

Related issues

Fixes: #1695

Blocked By: #22070

Screenshots/Recordings

Before

before_copy_changes.mov

After

after_copy_changes.mov

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained what problem this PR is solving and how it is solved.
• I've linked related issues
• I've included manual testing steps
• I've included screenshots/recordings if applicable
• 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.
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

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.

[metamaskbot]

Builds ready [821634a]

• 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
  • common: 0, 1, 2, 3, 4, 5, 6, 7
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (806 ± 46 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	90	147	115	18	9
		domContentLoaded	9	30	15	5	2
		load	671	1032	806	96	46
		domInteractive	9	30	15	5	2

Bundle size diffs [🚀 Bundle size reduced!]

• background: 0 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: -56 Bytes (-0.00%)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (978e57a) 68.12% compared to head (821634a) 68.12%.
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #22618   +/-   ##
========================================
  Coverage    68.12%   68.12%           
========================================
  Files         1087     1087           
  Lines        42663    42663           
  Branches     11349    11349           
========================================
  Hits         29064    29064           
  Misses       13599    13599           

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