Keep CCR REST API specification with all of X-Pack (#33743)

This commit moves the CCR REST API specification out of the CCR
sub-project to locate them with the rest of the REST API specifications
for X-Pack.

x-pack/plugin/ccr/qa/build.gradle

@@ -1,3 +1,13 @@
+import org.elasticsearch.gradle.test.RestIntegTestTask
+
+subprojects {
+  project.tasks.withType(RestIntegTestTask) {
+    final File xPackResources = new File(xpackProject('plugin').projectDir, 'src/test/resources')
+    project.copyRestSpec.from(xPackResources) {
+      include 'rest-api-spec/api/**'
+    }
+  }
+}
 
 /* Remove assemble on all qa projects because we don't need to publish
  * artifacts for them. */