some non required field in connector config (#2744) (#2745)

(cherry picked from commit 7548143)

Co-authored-by: Laura Trotta <[email protected]>

Author: github-actions[bot]

output/openapi/elasticsearch-openapi.json

@@ -92,9 +92,9 @@ export interface ConnectorConfigProperties {
   required: boolean
   sensitive: boolean
   tooltip?: string | null
-  type: ConnectorFieldType
-  ui_restrictions: string[]
-  validations: Validation[]
+  type?: ConnectorFieldType
+  ui_restrictions?: string[]
+  validations?: Validation[]
   value: UserDefinedValue
 }