[CodeHealth][rust] Update futures 0.3.27 => 0.3.31

[cdesouza-chromium]

This PR updates the futures crate to 0.3.31. This crate was causing audit failures on a different PR updating chrono.

chrono PR: #27693

Resolves brave/brave-browser#44057

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:

[github-actions]

[puLL-Merge] - brave/brave-core@27707

Description

This PR downgrades the futures crate and its subcrates from version 0.3.31 to 0.3.27 in the third-party Rust dependencies. This appears to be part of maintaining compatibility with a specific version of the Chromium codebase's Rust dependencies.

Changes

Changes

The following crates were downgraded from 0.3.31 to 0.3.27:

• futures
• futures-channel
• futures-core
• futures-executor
• futures-io
• futures-macro
• futures-sink
• futures-task
• futures-util

Changes involved:

• Renaming directories to reflect new version numbers
• Maintaining identical file content but under new version paths
• Preserving all license and documentation files
• Moving test files to match new directory structure

Note: This appears to be mostly a mechanical change to align version numbers rather than introducing functional changes, as the file contents remain identical between versions.```mermaid
sequenceDiagram
participant Old as Futures 0.3.31
participant New as Futures 0.3.27
Old->>New: Move source files
Old->>New: Move tests
Old->>New: Move documentation
Old->>New: Move licenses
Note over Old,New: Version downgrade with content preserved

</details>

<!-- Generated by claude-3-5-sonnet-20241022 -->

[github-actions]

Chromium major version is behind target branch (133.0.6943.98 vs 134.0.6998.15). Please rebase.

[mkarolin]

noplatform fails with unrelated js audit findings that have already been fixed in #27712

[brave-builds]

Released in v1.77.52