Added engine version argument to edit command. (#13610)

* Added engine version argument to edit command. Neccessary for not using pg12

* Included for changing password in overview page

* Updated fakeazdataapi test

extensions/azdata/src/typings/azdata-ext.d.ts

@@ -262,6 +262,7 @@ declare module 'azdata-ext' {
 							replaceEngineSettings?: boolean,
 							workers?: number
 						},
+						engineVersion?: string,
 						additionalEnvVars?: { [key: string]: string }): Promise<AzdataOutput<void>>
 				}
 			},