Revert Implement "reduce language fingerprinting" and follow ups

[bsclifton]

Revert Implement "reduce language fingerprinting" and follow ups
Fixes brave/brave-browser#23093

Reopens brave/brave-browser#20096
Reopens brave/brave-browser#816

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Reverts #12952
Which fixed brave/brave-browser#22177

Reverts #12942
Which fixed brave/brave-browser#21985

Reverts #13807
Which fixed brave/brave-browser#23489

Reverts #13205
Which fixed brave/brave-browser#22605

Reverts #12234
Which fixed brave/brave-browser#20096 and brave/brave-browser#816

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used GitHub auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

1. Visit brave://settings/shields
2. Verify the setting Prevent sites from fingerprinting me based on my language preferences was removed (if present, it would be above Trackers & ads blocking)
3. Try out some of the sites called out in Shields breaking text/fonts on some websites brave-browser#23093 and make sure font looks correct

[bsclifton]

Closing - we're going to solve by disabling by default (see #13905) and then using Griffin to roll out. Griffin is where the fix will happen for users (it'll be disabled there for 100% of users)

Staging rollout to 100% was done with brave/brave-variations#291 - production coming soon.