Summary
--

This PR partially addresses #23267. This warning is now implemented as the
RUF102 lint rule, so we can get rid of the warning.

There's actually a second instance of this warning (the only variant with tests)
for file-level `noqa`s. As I noted on the issue, these aren't actually covered
by RUF102, but I think we should make that change and remove that warning
separately.

Test Plan
--

Manual testing:

```console
❯ ruff check --select RUF102 --output-format=concise --no-cache - <<EOF
1 # noqa: X111
EOF
warning: Invalid rule code provided to `# noqa` at -:1: X111
-:1:3: RUF102 [*] Invalid rule code in `# noqa`: X111
Found 1 error.
[*] 1 fixable with the `--fix` option.

astral/worktrees/ruff1 on  brent/ruf102-warning [$?] is 📦 v0.15.1 via 🐍 v3.14.2 via 🦀 v1.93.0
❯ cargo run -p ruff -- check --select RUF102 --output-format=concise --no-cache - <<EOF
1 # noqa: X111
EOF
-:1:3: RUF102 [*] Invalid rule code in `# noqa`: X111
Found 1 error.
[*] 1 fixable with the `--fix` option.
```