ML extension - revised button component (#12674)

* Revert "Revert "ML extension updates  (#11817)" (#12645)"

This reverts commit 34a6200a47.

* Modified button template and renamed infoButton ElementRef

* fix rendering issue

* Minor code cleanup.

* add clean up previous button logic

Co-authored-by: Alan Ren <alanren@microsoft.com>

src/sql/workbench/api/common/sqlExtHost.api.impl.ts

@@ -539,6 +539,7 @@ export function createAdsApiFactory(accessor: ServicesAccessor): IAdsExtensionAp
 
 			return {
 				accounts,
+				ButtonType: sqlExtHostTypes.ButtonType,
 				connection,
 				credentials,
 				objectexplorer: objectExplorer,

src/sql/workbench/api/common/sqlExtHostTypes.ts

@@ -862,3 +862,9 @@ export enum SqlAssessmentResultItemKind {
 	Warning = 1,
 	Error = 2
 }
+
+export enum ButtonType {
+	File = 'File',
+	Normal = 'Normal',
+	Informational = 'Informational'
+}