[8.19] Mute the "rrf with pinned retriever as a sub-retriever" test (#129846)#129859

elasticsearchmachine merged 2 commits intoelastic:8.19elastic/elasticsearch:8.19from

Mikep86:backport/8.19/pr-129846Mikep86/elasticsearch:backport/8.19/pr-129846Copy head branch name to clipboard