Check/test compiletest normally as a staged ToolStd tool

But remove `python3 ../x.py check compiletest --set
build.compiletest-use-stage0-libtest=true` from `pr-check-1` and move
`./x test compiletest` to the last (and test `compiletest` unit tests
against staged compiler/library), as this will require a stage 1
(compiler, library) build to build `compiletest` itself as well.

Author: jieyouxu

src/ci/citool/tests/test-jobs.yml

@@ -27,7 +27,7 @@ runners:
     <<: *base-job
 envs:
   env-x86_64-apple-tests: &env-x86_64-apple-tests
-    SCRIPT: ./x.py check compiletest --set build.compiletest-use-stage0-libtest=true && ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
+    SCRIPT: ./x.py check compiletest && ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
     RUST_CONFIGURE_ARGS: --build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc
     RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
     # Ensure that host tooling is tested on our minimum supported macOS version.

src/ci/docker/host-x86_64/pr-check-1/Dockerfile

@@ -43,10 +43,9 @@ ENV SCRIPT \
   python3 ../x.py check bootstrap && \
   /scripts/check-default-config-profiles.sh && \
   python3 ../x.py build src/tools/build-manifest && \
-  python3 ../x.py test --stage 0 src/tools/compiletest && \
-  python3 ../x.py check compiletest --set build.compiletest-use-stage0-libtest=true && \
   python3 ../x.py check --target=i686-pc-windows-gnu --host=i686-pc-windows-gnu && \
   python3 ../x.py check --set build.optimized-compiler-builtins=false core alloc std --target=aarch64-unknown-linux-gnu,i686-pc-windows-msvc,i686-unknown-linux-gnu,x86_64-apple-darwin,x86_64-pc-windows-gnu,x86_64-pc-windows-msvc && \
   /scripts/validate-toolstate.sh && \
   reuse --include-submodules lint && \
-  python3 ../x.py test collect-license-metadata
+  python3 ../x.py test collect-license-metadata && \
+  python3 ../x.py test src/tools/compiletest

src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile

@@ -90,5 +90,5 @@ ENV HOST_TARGET x86_64-unknown-linux-gnu
 COPY scripts/shared.sh /scripts/
 
 ENV SCRIPT /tmp/checktools.sh ../x.py && \
-  python3 ../x.py check compiletest --set build.compiletest-use-stage0-libtest=true && \
+  python3 ../x.py check compiletest && \
   python3 ../x.py test tests/rustdoc-gui --stage 2 --test-args "'--jobs 1'"

src/ci/github-actions/jobs.yml

@@ -78,7 +78,7 @@ runners:
 
 envs:
   env-x86_64-apple-tests: &env-x86_64-apple-tests
-    SCRIPT: ./x.py check compiletest --set build.compiletest-use-stage0-libtest=true && ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
+    SCRIPT: ./x.py check compiletest && ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
     RUST_CONFIGURE_ARGS: --build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc
     # Ensure that host tooling is tested on our minimum supported macOS version.
     MACOSX_DEPLOYMENT_TARGET: 10.12