controller dropdown field to SQL MIAA and Postgres deployment. (#12217)

* saving first draft

* throw if no controllers

* cleanup

* bug fixes

* bug fixes and caching controller access

* pr comments and bug fixes.

* fixes

* fixes

* comment fix

* remove debug prints

* comment fixes

* remove debug logs

* inputValueTransformer returns string|Promise

* PR feedback

* pr fixes

* remove _ from protected fields

* anonymous to full methods

* small fixes

extensions/resource-deployment/src/utils.ts

@@ -40,7 +40,15 @@ export function setEnvironmentVariablesForInstallPaths(tools: ITool[], env: Node
 	}
 }
 
-export function assert(condition: boolean, message?: string): asserts condition {
+/**
+ * Throws an Error with given {@link message} unless {@link condition} is true.
+ * This also tells the typescript compiler that the condition is 'truthy' in the remainder of the scope
+ * where this function was called.
+ *
+ * @param condition
+ * @param message
+ */
+export function throwUnless(condition: boolean, message?: string): asserts condition {
 	if (!condition) {
 		throw new Error(message);
 	}