[NOCOMMIT] Revert "Flat object field should delegate to keyword field for most query types (opensearch-project#14383)"

This reverts commit 9ddee61.

Trying to identify the source of a benchmark regression for big5
keyword-in-range query.

Signed-off-by: Michael Froh <[email protected]>

Author: msfroh

rest-api-spec/src/main/resources/rest-api-spec/test/index/90_flat_object.yml

@@ -671,6 +671,38 @@ teardown:
   - match: { error.root_cause.0.reason: "Mapping definition for [data] has unsupported parameters:  [analyzer : standard]"}
   - match: { status: 400 }
 
+  # Wildcard Query with dot path.
+  - do:
+      catch: bad_request
+      search:
+        body: {
+          _source: true,
+          query: {
+            "wildcard": {
+              "catalog.title": "Mock*"
+            }
+          }
+        }
+  - match: { error.root_cause.0.type: "query_shard_exception" }
+  - match: { error.root_cause.0.reason: "Can only use wildcard queries on keyword and text fields - not on [catalog.title] which is of type [flat_object]"}
+  - match: { status: 400 }
+
+  # Wildcard Query without dot path.
+  - do:
+      catch: bad_request
+      search:
+        body: {
+          _source: true,
+          query: {
+            "wildcard": {
+              "catalog": "Mock*"
+            }
+          }
+        }
+  - match: { error.root_cause.0.type: "query_shard_exception" }
+  - match: { error.root_cause.0.reason: "Can only use wildcard queries on keyword and text fields - not on [catalog] which is of type [flat_object]" }
+  - match: { status: 400 }
+
   # Aggregation and Match Query with dot path.
   - do:
       catch: bad_request