Move the Lock into symbol::Interner

[bjorn3]

This makes it easier to make the symbol interner (near) lock free in case of concurrent accesses in the future.

With #87867 landed this shouldn't affect performance anymore.

[rust-highfive]

r? @wesleywiser

(rust-highfive has picked a reviewer for you, use r? to override)

[bjorn3]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

[bors]

⌛ Trying commit ccba8cb with merge 273547a8df9a9e7a9975c1623386ad1f5b39bcee...

[Mark-Simulacrum]

r=me presuming perf is OK.

I'm not sure the 2nd and 3rd commits should be in this PR, but they seem okay anyway.

[bors]

☀️ Try build successful - checks-actions
Build commit: 273547a8df9a9e7a9975c1623386ad1f5b39bcee (273547a8df9a9e7a9975c1623386ad1f5b39bcee)

[rust-timer]

Queued 273547a8df9a9e7a9975c1623386ad1f5b39bcee with parent 2c7bc5e, future comparison URL.

[rust-timer]

Finished benchmarking commit (273547a8df9a9e7a9975c1623386ad1f5b39bcee): comparison url.

Summary: This benchmark run did not return any relevant changes.

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR led to changes in compiler perf.

@bors rollup=never
@rustbot label: +S-waiting-on-review -S-waiting-on-perf -perf-regression

[bjorn3]

A slight improvement for 2 benchmarks. No significant changes for the rest.

@bors r=Mark-Simulacrum

[bors]

📌 Commit ccba8cb has been approved by Mark-Simulacrum

[bors]

🌲 The tree is currently closed for pull requests below priority 100. This pull request will be tested once the tree is reopened.

[bors]

⌛ Testing commit ccba8cb with merge 6c33a0a...

[bors]

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 6c33a0a to master...

[rust-timer]

Finished benchmarking commit (6c33a0a): comparison url.

Summary: This benchmark run did not return any relevant changes.

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

@rustbot label: -perf-regression