[infra] update vscode-test to fix access issues when locally testing

[AndrewJakubowicz]

Context

Discovered this when trying to locally test and develop the analyzer. This fix is from my issue filed on vscode-test.

Relevant issue: https://github.com/microsoft/vscode-test/issues/254

This may also fix GitHub actions that had errors.

Risk

Risk should be minimal as this updates a test only dependency.

[AndrewJakubowicz]

I do not have permissions to request review, so cc @rictic Thank you!