CLOUDP-284437: Add Spectral rule to ensure operationId uses camelcase

Author: andreaangiolillo

tools/spectral/.spectral.yaml

@@ -124,7 +124,7 @@ rules:
 
   xgen-docs-operationId-camel-case:
     description: operationId should be camelCased.
-    given: "operationId"
+    given: "$.operationId"
     severity: error
     then:
       function: casing