Revert "Split x86_64-msvc-ext into two jobs"

This reverts commit 7358429.

Author: tgross35

src/ci/docker/host-x86_64/x86_64-gnu-tools/checktools.sh

@@ -58,11 +58,8 @@ case $HOST_TARGET in
     # Strangely, Linux targets do not work here. cargo always says
     # "error: cannot produce cdylib for ... as the target ... does not support these crate types".
     # Only run "pass" tests, which is quite a bit faster.
-    #FIXME: Re-enable this once CI issues are fixed
-    # See <https://github.com/rust-lang/rust/issues/127883>
-    # For now, these tests are moved to `x86_64-msvc-ext2` in `src/ci/github-actions/jobs.yml`.
-    #python3 "$X_PY" test --stage 2 src/tools/miri --target aarch64-apple-darwin --test-args pass
-    #python3 "$X_PY" test --stage 2 src/tools/miri --target i686-pc-windows-gnu --test-args pass
+    python3 "$X_PY" test --stage 2 src/tools/miri --target aarch64-apple-darwin --test-args pass
+    python3 "$X_PY" test --stage 2 src/tools/miri --target i686-pc-windows-gnu --test-args pass
     ;;
   *)
     echo "FATAL: unexpected host $HOST_TARGET"
@@ -71,7 +68,6 @@ case $HOST_TARGET in
 esac
 # Also smoke-test `x.py miri`. This doesn't run any actual tests (that would take too long),
 # but it ensures that the crates build properly when tested with Miri.
-#FIXME: Re-enable this once CI issues are fixed
-#python3 "$X_PY" miri --stage 2 library/core --test-args notest
-#python3 "$X_PY" miri --stage 2 library/alloc --test-args notest
-#python3 "$X_PY" miri --stage 2 library/std --test-args notest
+python3 "$X_PY" miri --stage 2 library/core --test-args notest
+python3 "$X_PY" miri --stage 2 library/alloc --test-args notest
+python3 "$X_PY" miri --stage 2 library/std --test-args notest

src/ci/github-actions/jobs.yml

@@ -436,22 +436,6 @@ auto:
       DEPLOY_TOOLSTATES_JSON: toolstates-windows.json
     <<: *job-windows-8c
 
-  # Temporary builder to workaround CI issues
-  # See <https://github.com/rust-lang/rust/issues/127883>
-  #FIXME: Remove this, and re-enable the same tests in `checktools.sh`, once CI issues are fixed.
-  - image: x86_64-msvc-ext2
-    env:
-      SCRIPT: >
-        python x.py test --stage 2 src/tools/miri --target aarch64-apple-darwin --test-args pass &&
-        python x.py test --stage 2 src/tools/miri --target i686-pc-windows-gnu --test-args pass &&
-        python x.py miri --stage 2 library/core --test-args notest &&
-        python x.py miri --stage 2 library/alloc --test-args notest &&
-        python x.py miri --stage 2 library/std --test-args notest
-
-      HOST_TARGET: x86_64-pc-windows-msvc
-      RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-lld
-    <<: *job-windows-8c
-
   # 32/64-bit MinGW builds.
   #
   # We are using MinGW with POSIX threads since LLVM requires