Kusto Notebook Kernel Changes (#11760)

* Able to get Kernel Alias using extension registery

* Get Kernel Alias through Capability Services

* Notebook Action feature to add kusto to dropdown based on extension - complete

* Fixed indexing issue when Kusto is in kernels Dropdown

* Kusto Kernel listed properly and selected when kernel changes

* Added kernel change when user Attaches To Kusto connection

* Deleted unnecessary code/refactored

* Fix Merge Issues

* Resolving Compile issues - test file error

* Capabilities Provider Changes

* Fixed Notebook Tests

* Rearchitect kernel changes to Notebook Model

* Address minor changes

src/sql/platform/capabilities/common/capabilitiesService.ts

@@ -21,6 +21,7 @@ export const clientCapabilities = {
 export interface ConnectionProviderProperties {
 	providerId: string;
 	displayName: string;
+	notebookKernelAlias?: string;
 	azureResource?: string;
 	connectionOptions: azdata.ConnectionOption[];
 }