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dfcdbcff - Merge remote-tracking branch 'origin/main' into dcreager/callable-return

Merge remote-tracking branch 'origin/main' into dcreager/callable-return * origin/main: Fluent formatting of method chains (#21369) [ty] Avoid stack overflow when calculating inferable typevars (#21971) [ty] Add "qualify ..." code fix for undefined references (#21968) [ty] Use jemalloc on linux (#21975) Update MSRV to 1.90 (#21987) [ty] Improve check enforcing that an overloaded function must have an implementation (#21978) Update actions/checkout digest to 8e8c483 (#21982) [ty] Use `ParamSpec` without the attr for inferable check (#21934) [ty] Emit diagnostic when a type variable with a default is followed by one without a default (#21787)