Add a live e2e test to validate aka.ms links for linter rules

Minimum requirements:
* The test should follow aka.ms redirects
* The test should assert that the rule code is present in the response so that placeholder pages are flagged.

Start by locating the repository's existing end-to-end tests for linter rules and the code or test helpers that build their aka.ms links. Add coverage that follows redirects and verifies the response contains the rule code, so placeholder pages fail the test.

Written by the indexing model from the issue text.