Make Create Azure Function with SQL Binding more efficient and simple (#19187)

* initial refactor

* fix projectFolder cases

* update create azure function with sql binding when no folder is opened

* corner case exit browse file

* add version since targetFramework is set to specific core tools version

* update telemetry and address comments

* use project folder instead

extensions/sql-bindings/src/common/utils.ts

@@ -123,11 +123,16 @@ export function timeoutPromise(errorMessage: string, ms: number = 10000): Promis
  * Gets a unique file name
  * Increment the file name by adding 1 to function name if the file already exists
  * Undefined if the filename suffix count becomes greater than 1024
- * @param folderPath selected project folder path
  * @param fileName base filename to use
+ * @param folderPath selected project folder path
  * @returns a promise with the unique file name, or undefined
  */
-export async function getUniqueFileName(folderPath: string, fileName: string): Promise<string | undefined> {
+export async function getUniqueFileName(fileName: string, folderPath?: string): Promise<string | undefined> {
+	if (!folderPath) {
+		// user is creating a brand new azure function project
+		return undefined;
+	}
+
 	let count: number = 0;
 	const maxCount: number = 1024;
 	let uniqueFileName = fileName;