[Tracking issue] New lint metadata collection (a metadata collection monster)

[xFrednet]

This issue tracks the effort to replace the current lint documentation collection with a new Rust implementation. The implementation will be based on a lint to access rustc's type information (See #4310 for further information). The first incomplete version of the metadata collection monster (as I like to call it) got merged in #6887.

To-Do list

• Collect lint metadata
  • The lint ID
  • The lint declaration file and location (for link from the lint in the docs to the code #1303)
  • The lint group
  • The documentation
  • The applicability (if resolvable)
  • Is the suggesting a multi-part-suggestion? (if resolvable)
• Collect deprecated lints
  • draft
  • PR Metadata collection monster eating deprecated lints #7197
  • backup implementation to collect from store.register_removed commit
• Collect lint configuration values
  • PR Metadata collection monster searching for Clippy's configuration options #7214
• Create a simple way to run the lint collector, maybe via a cargo alias
  • PR Add cargo collect-metadata as an cargo alias for the metadata collection lint #7217
• Rerun the collection after touching the clippy_lints/src/lib.rs if nothing was collected due to caching (See comments in this issue)
  • PR Adding the ability to invalidate caches to force metadata collection #7256
• Remove clippy:: prefix from lint group and add the lint level
  • PR Adding the default lint level to the metadata collection #7246
• Switch the CI over to use the new collection
  • Discussion about this in Adding a dev website path for the new lints.json format and testing deployment #7229
  • PR Switch CI to new metadata collection #7298
• Adapt Clippy's lint list to support the new metadata format (Example output file: metadata_collection.json)
  • PR Adapting the lint list to Clippy's new metadata format #7279
• Remove old implementation
• Collect renamed lints (Collect renamed lints #8843 Thanks to @Serial-ATA)
• Update documentation
  • Lint configuration doc comment schema
  • Registering deprecated lints
  • Update configuration section template to use ### Configuration instead of **Configuration**
• Collect implementation version (See Add the clippy/rust verison of lint introduced to the website #6492)

Needs investigation / discussion

• Look into speeding up the collection by only registering the collection lint itself. (Suggested by @flip1995 here) (Related discussion about registration)
  • Done by flip1995 in PR Early return from LintPass registration when collecting metadata #7253
• Maybe include the lint output for the examples if it's not too much effort. (Suggested here)

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@rustbot label +C-tracking-issue

[flip1995]

Found a "bug" while syncing: If you re-run the cargo collect-metadata command, it won't re-produce the json file again, since it thinks that it already ran on the crate and no re-check is necessary.