Bug: `grpcInflightLimitCheck` doesn't always call `RPCCallFinished`

[colega]

This is a child issue for grafana/mimir#12966

When updating google.golang.org/grpc to v1.75 it includes the change from grpc/grpc-go#8439 which causes this statement to no longer be true:

dskit/server/limits.go

Line 46 in 2b7008c

// If we accept request (no error), eventually HandleRPC with stats.End notification will be called.

The new shortcut introduced after calling the InTapHandle causes request to be early-aborted after executing the tap handle, so RPCCallStarting was already called but RPCCallFinished will never be called.