Enable proposed API by default (microsoft#12)

Turns out we used to already do this and if you passed the flag you
would actually *disable* the global enable setting.  This is because we
were defaulting to an empty array which means to enable it globally.

Fixes coder/code-server#4397
Fixes coder/code-server#4480

Author: code-asher

src/vs/workbench/services/extensions/common/abstractExtensionService.ts

@@ -1140,6 +1140,10 @@ class ProposedApiController {
 
 		this._productEnabledExtensions = new Map<string, ApiProposalName[]>();
 
+		/** @coder Always enable the proposed API. */
+		this._envEnablesProposedApiForAll = true;
+		this._logService.debug('[Extensions]', 'Coder: Enabled All Proposed APIs');
+
 		// todo@jrieken this is deprecated and will be removed
 		// OLD world - extensions that are listed in `extensionAllowedProposedApi` get all proposals enabled
 		if (isNonEmptyArray(productService.extensionAllowedProposedApi)) {