Skip shards/replicas integration tests for markdown-only PR changes (#1414)

Co-authored-by: Claude <noreply@anthropic.com>

Author: papa99do

.github/workflows/integration_tests_with_shards_and_replicas.yml

@@ -12,6 +12,8 @@ on:
     branches:
       - mainline
       - releases/*
+    paths-ignore:
+      - '**.md'
   push:
     branches:
       - mainline