Remove shorts for youtube

[deeppandya]

Resolves brave/brave-browser#36465

Submitter Checklist:

• I confirm that no security/privacy review is needed and no other type of reviews are needed, or that I have requested them
• 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 wiki
  • npm run presubmit wiki, 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/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

[tapanmodh]

lgtm

[bsclifton]

string reviewers ++

[kjozwiak]

Verification PASSED on Pixel 6 running Android 14 using the following build(s):

Brave | 1.67.57 Chromium: 124.0.6367.118 (Official Build) canary (64-bit)
--- | ---
Revision | e95911d7eb4ea56fa157bcfa7ddd27fbd96a98b9
OS | Android 14; Build/AP21.240305.005; 34; REL

• ensured that Block YouTube Shorts has been added into Hamburger Menu -> Settings -> Media
• ensured that Shorts are visible under the Home, Search & Trending pages by default
  • ensured that Block YouTube Shorts is disabled by default
  • ensured that restarting the browser retains the current state (both Enabled & Disabled)
• ensured that once Block YouTube Shorts has been enabled, Shorts are not being displayed via Home, Trending & Search

Default/Disabled (Shorts visible/being displayed)

Example	Example	Example	Example	Example	Example	Example

Enabling/Disabling and checking Home

• Example Video --> https://youtu.be/J7v4K8UIXhM (Mobile)
• Example Video --> https://youtu.be/jzG-IJMYQE8 (Desktop)

Enabling/Disabling and checking Trending

• Example Video --> https://youtube.com/shorts/85sX0Rp_0Zc (Mobile)
• Example Video --> https://youtu.be/rE1dd24pDyk (Desktop)

Enabling/Disabling and checking Search Results

• Example Video --> https://youtu.be/ov9Oj_WRE90 (Mobile)
• Example Video --> https://youtu.be/Ejk5RZCIttY (Desktop)