ci: Make the x86_64-gnu-parallel-frontend job non-optional

Author: petrochenkov

…-x86_64-gnu-parallel-frontend/Dockerfile …/x86_64-gnu-parallel-frontend/Dockerfilesrc/ci/docker/host-x86_64/optional-x86_64-gnu-parallel-frontend/Dockerfile renamed to src/ci/docker/host-x86_64/x86_64-gnu-parallel-frontend/Dockerfile src/ci/docker/host-x86_64/optional-x86_64-gnu-parallel-frontend/Dockerfile renamed to src/ci/docker/host-x86_64/x86_64-gnu-parallel-frontend/Dockerfile

@@ -39,5 +39,5 @@ ENV RUST_CONFIGURE_ARGS \
 # Tests are still compiled serially at the moment (intended to be changed in follow-ups).
 # Running compiletest only tests for parallel frontend, then the rest without compiletest-only
 # options (i.e. `--parallel-frontend-threads=4 --iteration-count=2`)
-COPY ./scripts/optional-x86_64-gnu-parallel-frontend.sh /scripts/
+COPY ./scripts/x86_64-gnu-parallel-frontend.sh /scripts/
 ENV SCRIPT="Must specify DOCKER_SCRIPT for this image"

…optional-x86_64-gnu-parallel-frontend.sh …/scripts/x86_64-gnu-parallel-frontend.shsrc/ci/docker/scripts/optional-x86_64-gnu-parallel-frontend.sh renamed to src/ci/docker/scripts/x86_64-gnu-parallel-frontend.sh src/ci/docker/scripts/optional-x86_64-gnu-parallel-frontend.sh renamed to src/ci/docker/scripts/x86_64-gnu-parallel-frontend.sh

@@ -382,11 +382,9 @@ auto:
   - name: x86_64-gnu
     <<: *job-linux-4c
 
-  - name: optional-x86_64-gnu-parallel-frontend
-    # This test can be flaky, so do not cancel CI if it fails, for now.
-    continue_on_error: true
+  - name: x86_64-gnu-parallel-frontend
     env:
-      DOCKER_SCRIPT: optional-x86_64-gnu-parallel-frontend.sh
+      DOCKER_SCRIPT: x86_64-gnu-parallel-frontend.sh
     <<: *job-linux-4c
 
   # This job ensures commits landing on nightly still pass the full