Mute ydb/core/kqp/workload_service/ut/ResourcePoolClassifiersDdl.TestCreateResourcePoolClassifierOnServerless

[maximyurchuk]

It was reported by @adameat in https://github.com/ydb-platform/ydb/pull/10601

See test history (passed rate is like 85%)

ydb/core/kqp/workload_service/ut/ResourcePoolClassifiersDdl.TestCreateResourcePoolClassifierOnServerless

Add line to muted_ya.txt: ydb/core/kqp/workload_service/ut ResourcePoolClassifiersDdl.TestCreateResourcePoolClassifierOnServerless

Owner: TEAM:@ydb-platform/qp

Read more in mute_rules.md

Summary history: Success rate 100% Pass:5 Fail:0

Test run history: link

More info in dashboard