Rollup merge of #86639 - eholk:lint-tool, r=petrochenkov

Support lint tool names in rustc command line options

When rustc is running without a lint tool such as clippy enabled, options for lints such as `clippy::foo` are meant to be ignored. This was already working for those specified by attrs, such as `#![allow(clippy::foo)]`, but this did not work for command line arguments like `-A clippy::foo`. This PR fixes that issue.

Note that we discovered this issue while discussing https://github.com/rust-lang/cargo/issues/5034.

Fixes #86628.

compiler/rustc_lint/src/lib.rs

@@ -497,3 +497,6 @@ fn register_internals(store: &mut LintStore) {
         ],
     );
 }
+
+#[cfg(test)]
+mod tests;