Inline ActiveGuardDrop::drop_and_maybe_poison.

To fix a small perf regression from #153471.

Author: nnethercote

compiler/rustc_query_impl/src/execution.rs

@@ -157,6 +157,7 @@ where
         this.drop_and_maybe_poison(/* poison */ false);
     }
 
+    #[inline(always)]
     fn drop_and_maybe_poison(&mut self, poison: bool) {
         let status = {
             let mut shard = self.state.active.lock_shard_by_hash(self.key_hash);