Brew: 5.1.2 Release

<!-- Release notes generated using configuration in .github/release.yml at main -->

What's Changed

• Cleanup old shims and cccfg flags by @Bo98 in https://github.com/Homebrew/brew/pull/21807
• bundle/adder: support --describe flag by @mvanhorn in https://github.com/Homebrew/brew/pull/21797
• cask: avoid outputting Rosetta 2 caveats on Intel machines by @mvanhorn in https://github.com/Homebrew/brew/pull/21782
• Use native Rust tests for Rust frontend by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/21805
• brew-rs: unset HOMEBREW_NO_INSTALL_FROM_API env by @samford in https://github.com/Homebrew/brew/pull/21812
• rubocops: disallow libiconv dependency in homebrew/core by @carlocab in https://github.com/Homebrew/brew/pull/21810
• github_runner_matrix: use 10.15-cross by @Bo98 in https://github.com/Homebrew/brew/pull/21813
• workflows/tests: migrate from deprecated test-results-action by @Bo98 in https://github.com/Homebrew/brew/pull/21815
• docs/Brewfile: use unversioned Ruby formula by @p-linnane in https://github.com/Homebrew/brew/pull/21817
• Print download error details when using concurrency by @Bo98 in https://github.com/Homebrew/brew/pull/21818
• workflows/release: migrate actions/attest-build-provenance by @p-linnane in https://github.com/Homebrew/brew/pull/21819
• bundle/cargo: respect CARGO_HOME and friends by @branchv in https://github.com/Homebrew/brew/pull/21795
• Add brew-rs fetch support by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/21823
• brew-rs: add ohai function and TTY methods by @botantony in https://github.com/Homebrew/brew/pull/21809
• Avoid auto-linking keg-only versioned formulae by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/21824
• bundle: add npm (Node.js) extension by @mvanhorn in https://github.com/Homebrew/brew/pull/21820
• brew-rs/fetch: use functions from tty module by @botantony in https://github.com/Homebrew/brew/pull/21825
• Fix test-bot links in documentation by @dnicolson in https://github.com/Homebrew/brew/pull/21826
• build(deps): bump the bundler group across 2 directories with 9 updates by @dependabot[bot] in https://github.com/Homebrew/brew/pull/21832
• bundle/brew_services: avoid parsing output of brew services list by @carlocab in https://github.com/Homebrew/brew/pull/21830
• cmd/search: resolve error with regex by @samford in https://github.com/Homebrew/brew/pull/21811
• Portable Ruby 4.0.2 by @p-linnane in https://github.com/Homebrew/brew/pull/21816
• services/system: print warnings to stderr instead of stdout by @stepbrobd in https://github.com/Homebrew/brew/pull/21837
• pkgconfig_spec: fix expat version regex by @p-linnane in https://github.com/Homebrew/brew/pull/21842
• brew-rs: enable compression in reqwest by @samford in https://github.com/Homebrew/brew/pull/21835
• Fix UID race condition in parallel downloads by @carlocab in https://github.com/Homebrew/brew/pull/21838
• tap-new: use run_as_real_uid: instead of Utils::UID.drop_euid by @carlocab in https://github.com/Homebrew/brew/pull/21839
• Add HOMEBREW_FORCE_BREW_WRAPPER_HELP_MESSAGE by @petros in https://github.com/Homebrew/brew/pull/21834
• Load casks from the internal API by @Rylan12 in https://github.com/Homebrew/brew/pull/21662
• Support (very, very) basic brew-rs installs by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/21840
• bundle: add krew (kubectl plugin manager) support by @costajohnt in https://github.com/Homebrew/brew/pull/21802
• brew-rs: enable strip for release by @samford in https://github.com/Homebrew/brew/pull/21836
• build(deps): bump actions/cache from 5.0.3 to 5.0.4 in the github-actions group across 1 directory by @dependabot[bot] in https://github.com/Homebrew/brew/pull/21847
• build(deps): bump the bundler group across 2 directories with 6 updates by @dependabot[bot] in https://github.com/Homebrew/brew/pull/21846
• style: use per-tap actionlint config when available by @p-linnane in https://github.com/Homebrew/brew/pull/21843
• build(deps-dev): bump mcp from 0.8.0 to 0.9.2 in /Library/Homebrew by @dependabot[bot] in https://github.com/Homebrew/brew/pull/21851
• build(deps-dev): bump ruby-lsp from 0.26.8 to 0.26.9 in /Library/Homebrew by @dependabot[bot] in https://github.com/Homebrew/brew/pull/21852
• bundler: update bigdecimal mcp ruby-lsp by @p-linnane in https://github.com/Homebrew/brew/pull/21856
• Gemfile.lock: add checksums by @p-linnane in https://github.com/Homebrew/brew/pull/21857
• brew-rs: set reqwest user agent by @samford in https://github.com/Homebrew/brew/pull/21849
• tests: check all of vendor/bundle for uncommitted changes by @p-linnane in https://github.com/Homebrew/brew/pull/21863
• utils/pypi: allow bumping mix of livecheck-defined and PyPI resources by @cho-m in https://github.com/Homebrew/brew/pull/21862
• bundle: add base class helpers and DRY up extension executable handling by @costajohnt in https://github.com/Homebrew/brew/pull/21854
• Add simple Rust install deps by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/21850
• livecheck: add throttling by days by @dasmfm in https://github.com/Homebrew/brew/pull/21853

New Contributors

• @stepbrobd made their first contribution in https://github.com/Homebrew/brew/pull/21837
• @petros made their first contribution in https://github.com/Homebrew/brew/pull/21834

Full Changelog: https://github.com/Homebrew/brew/compare/5.1.1...5.1.2