Enable use_resizable_semaphore_in_concurrency_limiter flag by default

This flag controls the usage of the resizble semaphore implementation.
This semaphore is the core of the concurrency limiter. This commit
enables the flag by default after it is enabled on GitLab.com
production.
- MR: https://gitlab.com/gitlab-org/gitaly/-/merge_requests/6366
- Rollout issue: https://gitlab.com/gitlab-org/gitaly/-/issues/5581

internal/featureflag/ff_use_resizable_semaphore_in_concurrency_limiter.go

@@ -8,5 +8,5 @@ var UseResizableSemaphoreInConcurrencyLimiter = NewFeatureFlag(
 	"use_resizable_semaphore_in_concurrency_limiter",
 	"v16.5.0",
 	"https://gitlab.com/gitlab-org/gitaly/-/issues/5581",
-	false,
+	true,
 )