system_config.rb: refactor code into worker functions

build(deps): bump sorbet from 0.5.5890 to 0.5.5891 in /Library/Homebrew

Autogenerated by [a scheduled GitHub Action](https://github.com/Homebrew/brew/blob/master/.github/workflows/tapioca.yml).

utils/pypi: downcase name prior to excluding

Ignore URLs protected by CloudFlare when auditing.

shared_audits: ensure GitLab API response is valid

Add `GITHUB_FORK_ALLOWLIST`.

Co-authored-by: Seeker <meaningseeking@protonmail.com>

Bumps [sorbet](https://github.com/sorbet/sorbet) from 0.5.5890 to 0.5.5891.
- [Release notes](https://github.com/sorbet/sorbet/releases)
- [Commits](https://github.com/sorbet/sorbet/commits

)

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

download_strategy: silence detached head warning on git clone

build(deps): bump sorbet-runtime from 0.5.5890 to 0.5.5891 in /Library/Homebrew

Remove trailing slash from SPDX license exception URL

Use `curl` workarounds for both `curl` and `curl_output`.

Add `SharedAudits::gitlab_release`.

Bumps [sorbet-runtime](https://github.com/sorbet/sorbet) from 0.5.5890 to 0.5.5891.
- [Release notes](https://github.com/sorbet/sorbet/releases)
- [Commits](https://github.com/sorbet/sorbet/commits

)

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

Only audit appcast URL if specified and check its contents.

audit: allow pre-releases in cask-versions

Move more common code into `SharedAudits`.

build(deps): bump codecov from 0.2.9 to 0.2.10 in /Library/Homebrew

utils/github: add `create_bump_pr`

Bumps [codecov](https://github.com/codecov/codecov-ruby) from 0.2.9 to 0.2.10.
- [Release notes](https://github.com/codecov/codecov-ruby/releases)
- [Changelog](https://github.com/codecov/codecov-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-ruby/compare/v0.2.9...v0.2.10

)

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

Break down `dump_verbose_config` function into "worker" functions that
display information for specific categories:

- `core_tap_config` for Core tap info
- `homebrew_config` for Homebrew/brew info
- `homebrew_env_config` for environment-related information
- `host_software_config` for Host software

Also, factor out code related to Clang into `describe_clang` function,
so that we can do:

```
f.puts "Clang: #{describe_clang}"
```

bump-formula-pr: make `--dry-run` conflict with `--write`

Also add `--commit` to a create commit without opening a pull request

workflows: reduce scheduled PR workflow's frequency.