[metrics][rpc]: add basic prefix filter test for new rpc metric (#12598)
[metrics][rpc]: add basic prefix filter test for new rpc metric (#12598)

Signed-off-by: FFMMM <17d740d54b668fa658318b7f6765814ea17eed69@users.noreply.github.com>
hashicorp/consul,hashicorp/consul,hashicorp/consul,hashicorp/consul