Unconditionally enable the proposed API

To test run an extension that uses the proposed API (i.e.
https://github.com/microsoft/vscode-extension-samples/tree/ddae6c0c9ff203b4ed6f6b43bfacdd0834215f83/proposed-api-sample)

We also override isProposedApiEnabled in case an extension does not declare the
APIs it needs correctly (the Jupyter extension had this issue).

Index: code-server/lib/vscode/src/vs/workbench/services/extensions/common/extensions.ts
===================================================================
--- code-server.orig/lib/vscode/src/vs/workbench/services/extensions/common/extensions.ts
+++ code-server/lib/vscode/src/vs/workbench/services/extensions/common/extensions.ts
@@ -321,10 +321,7 @@ function extensionDescriptionArrayToMap(
 }
 
 export function isProposedApiEnabled(extension: IExtensionDescription, proposal: ApiProposalName): boolean {
-	if (!extension.enabledApiProposals) {
-		return false;
-	}
-	return extension.enabledApiProposals.includes(proposal);
+	return true
 }
 
 export function checkProposedApiEnabled(extension: IExtensionDescription, proposal: ApiProposalName): void {
Index: code-server/lib/vscode/src/vs/workbench/services/extensions/common/extensionsProposedApi.ts
===================================================================
--- code-server.orig/lib/vscode/src/vs/workbench/services/extensions/common/extensionsProposedApi.ts
+++ code-server/lib/vscode/src/vs/workbench/services/extensions/common/extensionsProposedApi.ts
@@ -31,7 +31,7 @@ export class ExtensionsProposedApi {
 
 		this._envEnabledExtensions = new Set((_environmentService.extensionEnabledProposedApi ?? []).map(id => ExtensionIdentifier.toKey(id)));
 
-		this._envEnablesProposedApiForAll =
+		this._envEnablesProposedApiForAll = true ||
 			!_environmentService.isBuilt || // always allow proposed API when running out of sources
 			(_environmentService.isExtensionDevelopment && productService.quality !== 'stable') || // do not allow proposed API against stable builds when developing an extension
 			(this._envEnabledExtensions.size === 0 && Array.isArray(_environmentService.extensionEnabledProposedApi)); // always allow proposed API if --enable-proposed-api is provided without extension ID
