Fixes smallvec rust vulnerability (1.19.x).

[mkarolin]

Fixes brave/brave-browser#13446
Fixes brave/brave-browser#13101

Uplift from #7551
Uplift from #7412

Submitter Checklist:

• There is a ticket for my issue.
• Used Github auto-closing keywords in the commit message.
• Wrote a good PR/commit description
• 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).
• Requested a security/privacy review as needed.

Reviewer Checklist:

• 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:

[kjozwiak]

@mkarolin mind taking a look? Looks like CI is failing on every platform due to the following error/failure:

10:02:46  FAILED: brave_rust/out/x64/x86_64-unknown-linux-gnu/release/libbrave_rust.a 
10:02:46  python ../../brave/script/cargo.py --rustup_path=../../brave/build/rustup/ --cargo_path=../../brave/build/rustup/ --manifest_path=../../brave/build/rust/Cargo.toml --build_path=brave_rust/out/x64 --target=x86_64-unknown-linux-gnu --toolchain= --is_debug=false --rust_flags=\ -C\ link-arg=--sysroot=\ \ -C\ link-arg=-Wl,-rpath=\$ORIGIN\ 
10:02:46      Blocking waiting for file lock on package cache
10:02:46      Updating git repository `https://github.com/brave/adblock-rust`
10:02:46      Updating crates.io index
10:02:46  error: failed to select a version for `once_cell`.
10:02:46      ... required by package `adblock v0.3.4 (https://github.com/brave/adblock-rust?rev=c647890b6d065daf98cba540d2232c100698c498#c647890b)`
10:02:46      ... which is depended on by `adblock-ffi v0.1.0 (/home/ubuntu/workspace/pr-brave-browser-pr7551_maxk-fix-smallvec_1.19.x-linux/src/brave/vendor/adblock_rust_ffi)`
10:02:46      ... which is depended on by `brave-rust v0.1.0 (/home/ubuntu/workspace/pr-brave-browser-pr7551_maxk-fix-smallvec_1.19.x-linux/src/brave/build/rust)`
10:02:46  versions that meet the requirements `^1.5` are: 1.5.2, 1.5.1
10:02:46  
10:02:46  all possible versions conflict with previously selected packages.
10:02:46  
10:02:46    previously selected package `once_cell v1.4.0`
10:02:46      ... which is depended on by `adblock v0.2.11`
10:02:46      ... which is depended on by `speedreader v0.1.0 (/home/ubuntu/workspace/pr-brave-browser-pr7551_maxk-fix-smallvec_1.19.x-linux/src/brave/components/speedreader/rust/lib)`
10:02:46      ... which is depended on by `speedreader-ffi v0.1.0 (/home/ubuntu/workspace/pr-brave-browser-pr7551_maxk-fix-smallvec_1.19.x-linux/src/brave/components/speedreader/rust/ffi)`
10:02:46      ... which is depended on by `brave-rust v0.1.0 (/home/ubuntu/workspace/pr-brave-browser-pr7551_maxk-fix-smallvec_1.19.x-linux/src/brave/build/rust)`
10:02:46  
10:02:46  failed to select a version for `once_cell` which could resolve this conflict
10:02:46  None
10:02:46  Traceback (most recent call last):
10:02:46    File "../../brave/script/cargo.py", line 101, in <module>
10:02:46      sys.exit(main())
10:02:46    File "../../brave/script/cargo.py", line 95, in main
10:02:46      build(parse_args())
10:02:46    File "../../brave/script/cargo.py", line 70, in build
10:02:46      raise e
10:02:46  subprocess.CalledProcessError: Command '['cargo', 'build', '--release', '--manifest-path=../../brave/build/rust/Cargo.toml', '--target-dir=brave_rust/out/x64', '--target=x86_64-unknown-linux-gnu']' returned non-zero exit status 101

[antonok-edm]

I believe it should be possible to fix this by running cargo update -p once_cell in the build/rust directory.

[kjozwiak]

Restarting macOS as it seems like build failed due to Timeout has been exceeded as per https://ci.brave.com/job/pr-brave-browser-pr7551_maxk-fix-smallvec_1.19.x-macos/4/execution/node/155/log/.

[kjozwiak]

macOS failed test-browser as per https://ci.brave.com/job/pr-brave-browser-pr7551_maxk-fix-smallvec_1.19.x-macos/5/execution/node/202/log/. Created brave/brave-browser#13510 as this seems like a new intermittent issue that hasn't been logged before. Doesn't block uplift as the failure isn't related to this specific PR.

11:25:08  1 test timed out:
11:25:08      BraveBookmarkModelLoadedObserverBrowserTest.NoClearSyncV1MetaInfo (../../brave/browser/profiles/brave_bookmark_model_loaded_observer_browsertest.cc:114)

[kjozwiak]

Uplift into 1.19.x approved after deliberating with @brave/uplift-approvers.