allow registering options source providers to resource-deployment (#12712)

* first draft

* compile fixes

* uncomment code

* waitForAzdataToolDisovery added to azdata api

* missed change in last commit

* remove switchReturn

* contributeOptionsSource renamed

* remove switchReturn reference

* create optionSourceService

* azdataTool usage more reliable

* package.json fixes and cleanup

* cleanup

* revert 4831a6e6b8b08684488b2c9e18092fa252e3057f

* pr feedback

* pr feedback

* pr feedback

* cleanup

* cleanup

* fix eulaAccepted check

* fix whitespade in doc comments.

extensions/arc/src/common/utils.ts

@@ -216,3 +216,17 @@ export function parseIpAndPort(address: string): { ip: string, port: string } {
 export function createCredentialId(controllerId: string, resourceType: string, instanceName: string): string {
 	return `${controllerId}::${resourceType}::${instanceName}`;
 }
+
+/**
+ * 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);
+	}
+}