bump-formula-pr: make it usable on linux

This commit makes it possible to use `bump-formula-pr` on linux to
contribute to `homebrew-core` as easily as it is on macOS, but with some
additional steps made before actual bumping of the formula.

Differences in the process (before bumping):
- add `homebrew-core` remote named `homebrew`
- fetch `homebrew/master`
- check if formula exists in `homebrew-core`
- switch to `homebrew/master` ref

formula: copy hidden files _from_ bottles.

work correctly info analysis args

build: bump html-pipeline from 2.12.1 to 2.12.2 in /docs

cask_loader: fix URI detection.

Bumps [html-pipeline](https://github.com/jch/html-pipeline) from 2.12.1 to 2.12.2.
- [Release notes](https://github.com/jch/html-pipeline/releases)
- [Changelog](https://github.com/jch/html-pipeline/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jch/html-pipeline/compare/v2.12.1...v2.12.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

cmd/upgrade: fix exit logic.

Fixes #6678

Fixes #6739

Fix Audit check for `env :std`

When performing a strict audit of a formula in the core tap, it was
possible that the check for `env :std` would not happen.

Handle 2.2.0 deprecations/disableds

README: add GitHub Sponsors link.

Merge pull request #6733 from Homebrew/dependabot/bundler/Library/Homebrew/rubocop-performance-1.5.1

build: bump rubocop-performance from 1.5.0 to 1.5.1 in /Library/Homebrew

Let people know we support this now. Don't need a dedicated link because we have one at the top of the page.

build: bump parallel from 1.18.0 to 1.19.0 in /docs

Bumps [parallel](https://github.com/grosser/parallel) from 1.18.0 to 1.19.0.
- [Release notes](https://github.com/grosser/parallel/releases)
- [Commits](https://github.com/grosser/parallel/compare/v1.18.0...v1.19.0

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [rubocop-performance](https://github.com/rubocop-hq/rubocop-performance) from 1.5.0 to 1.5.1.
- [Release notes](https://github.com/rubocop-hq/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop-performance/compare/v1.5.0...v1.5.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

build: bump html-pipeline from 2.12.0 to 2.12.1 in /docs

build: bump tins from 1.22.0 to 1.22.2 in /Library/Homebrew

upgrade: don't error if already installed.

Bumps [html-pipeline](https://github.com/jch/html-pipeline) from 2.12.0 to 2.12.1.
- [Release notes](https://github.com/jch/html-pipeline/releases)
- [Changelog](https://github.com/jch/html-pipeline/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jch/html-pipeline/compare/v2.12.0...v2.12.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

whether args days is in valid_days and args category is in valid_categories

Bumps [tins](https://github.com/flori/tins) from 1.22.0 to 1.22.2.
- [Release notes](https://github.com/flori/tins/releases)
- [Commits](https://github.com/flori/tins/compare/v1.22.0...v1.22.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Moved kegs from ARGV to args.rb

I've been convinced idempotency is a good thing for this command so this
would be a good thing to get out for 2.2.0.

build: bump rake from 13.0.0 to 13.0.1 in /docs

Update brew.sh: hide printf's stderr in numeric()

build: bump ffi from 1.11.1 to 1.11.2 in /docs

Bumps [rake](https://github.com/ruby/rake) from 13.0.0 to 13.0.1.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](https://github.com/ruby/rake/compare/v13.0.0...v13.0.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

os/mac: remove MacOS.cat.

Bumps [ffi](https://github.com/ffi/ffi) from 1.11.1 to 1.11.2.
- [Release notes](https://github.com/ffi/ffi/releases)
- [Changelog](https://github.com/ffi/ffi/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ffi/ffi/compare/1.11.1...1.11.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

None of the supported versions are "cats" any more.

Avoid #6721 and similar confusing messages during version comparison by hiding printf's stderr (printf woks anyway).