Temporarily disable Kotlin analysis in PR checks

Kotlin analysis is incompatible with Kotlin 1.8.0, which is now rolling
out to the Actions runner images.

While we work on a more permanent fix to our PR checks, this will
prevent us losing other
test coverage.

.github/workflows/debug-artifacts-failure.yml

@@ -2,6 +2,9 @@
 # when the analyze step fails.
 name: PR Check - Debug artifacts after failure
 env:
+  # Disable Kotlin analysis while it's incompatible with Kotlin 1.8, until we find a
+  # workaround for our PR checks.
+  CODEQL_EXTRACTOR_JAVA_AGENT_DISABLE_KOTLIN: true
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 on:
   push: