[release] test/runTest: use vscode 1.52.1

This is temporary to unblock our CI.

Updates #1190
Updates microsoft/vscode#115794

Change-Id: Icc642d692688695c00763fda3525488e0febb9ec
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/289770
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Suzy Mueller <suzmue@golang.org>
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
(cherry picked from commit df04ba2)
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/289971
Reviewed-by: Rebecca Stambler <rstambler@golang.org>

Author: hyangah

test/runTest.ts

@@ -18,6 +18,7 @@ async function main() {
 
 		// Download VS Code, unzip it and run the integration test
 		await runTests({
+			version: '1.52.1',
 			extensionDevelopmentPath,
 			extensionTestsPath,
 			launchArgs: [
@@ -36,6 +37,7 @@ async function main() {
 		// tslint:disable-next-line:max-line-length
 		// https://github.com/microsoft/vscode/blob/890f62dfd9f3e70198931f788c5c332b3e8b7ad7/src/vs/workbench/services/workspaces/browser/abstractWorkspaceEditingService.ts#L281
 		await runTests({
+			version: '1.52.1',
 			extensionDevelopmentPath,
 			extensionTestsPath: path.resolve(__dirname, './gopls/index'),
 			launchArgs: [