Removing field caps map capabilities to be on par with elasticsearch (#1367)

Elasticsearch does not emit `.keys()` and `.values()` for maps.
Definitely we should not emit `text` type as well. Below `bar` index is
handled by elasticsearch.

<img width="1686" alt="image"
src="https://github.com/user-attachments/assets/b2480303-0a79-49f9-ae9f-2c6aa81f0afb"
/>



and `foo` index handled by `quesma` and `clickhouse` after fix.


<img width="1689" alt="image"
src="https://github.com/user-attachments/assets/3e36a022-75a8-464e-a733-2be5be1b3336"
/>


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Author: pdelewski

platform/functionality/field_capabilities/field_caps.go

@@ -73,10 +73,6 @@ func handleFieldCapsIndex(cfg map[string]config.IndexConfiguration, schemaRegist
 				case "keyword", "text":
 					addFieldCapabilityFromSchemaRegistry(fields, fmt.Sprintf("%s%s", fieldName.AsString(), types.MultifieldKeywordSuffix), schema.QuesmaTypeKeyword, resolvedIndex)
 					addFieldCapabilityFromSchemaRegistry(fields, fmt.Sprintf("%s%s", fieldName.AsString(), types.MultifieldTextSuffix), schema.QuesmaTypeText, resolvedIndex)
-				case "map":
-					addFieldCapabilityFromSchemaRegistry(fields, fmt.Sprintf("%s%s", fieldName.AsString(), types.MultifieldTextSuffix), schema.QuesmaTypeText, resolvedIndex)
-					addFieldCapabilityFromSchemaRegistry(fields, fmt.Sprintf("%s%s", fieldName.AsString(), types.MultifieldMapKeysSuffix), schema.QuesmaTypeText, resolvedIndex)
-					addFieldCapabilityFromSchemaRegistry(fields, fmt.Sprintf("%s%s", fieldName.AsString(), types.MultifieldMapValuesSuffix), schema.QuesmaTypeText, resolvedIndex)
 				}
 			}