Add changes for flavor selection (#8419)

* Add changes for flavor selection

* Use getDefaultProviderId method

* Update default engine user setting description

* Add back check for codeEditor

* Add test for multiple providers

* Removing extra merge line

* Add an attribute to ConnectionProviderProperties for language flavor

Adding a boolean property to ConnectionProviderProperties for providers that are language flavors. When it is set to true, the provider will be part of drop down for changing SQL language flavor.

* Update variable name

* Put logic for removing CMS at one place and remove flag for flavor provider

* Using keys instead of entries

Using Object.keys instead of entries as doing [0] can be error prone if no provider matches.

* Adding logic to check from params

* Updating variable names

* Rename dedup map

* Fix action

src/sql/platform/connection/common/connectionManagement.ts

@@ -74,6 +74,9 @@ export interface IConnectionManagementService {
 	onConnectionChanged: Event<IConnectionParams>;
 	onLanguageFlavorChanged: Event<azdata.DidChangeLanguageFlavorParams>;
 
+	// Properties
+	providerNameToDisplayNameMap: { [providerDisplayName: string]: string };
+
 	/**
 	 * Opens the connection dialog to create new connection
 	 */
@@ -180,6 +183,8 @@ export interface IConnectionManagementService {
 
 	getDefaultProviderId(): string;
 
+	getUniqueConnectionProvidersByNameMap(providerNameToDisplayNameMap: { [providerDisplayName: string]: string }): { [providerDisplayName: string]: string };
+
 	/**
 	 * Cancels the connection
 	 */