test/integration/extension: disable all "Test Completion Snippets *"

Skip "Test Completion Snippets For Functions" on windows.

This should've been included in go.dev/cl/418356

For #832

Change-Id: Ieff2faa0bfd9154dcc834a30e0dc2259c4fa3b20
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/419110
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nooras Saba‎ <saba@golang.org>

test/integration/extension.test.ts

@@ -1128,6 +1128,9 @@ encountered.
 	});
 
 	test('Test No Completion Snippets For Functions', async () => {
+		if (affectedByIssue832()) {
+			return;
+		}
 		const provider = new GoCompletionItemProvider();
 		const uri = vscode.Uri.file(path.join(fixturePath, 'completions', 'nosnippets.go'));
 		const baseConfig = getGoConfig();