Demote x86_64-apple-darwin to Tier 2 with host tools

Switch to only using aarch64 runners (implying we are now
cross-compiling) and stop running tests. In the future, we could
enable (some?) tests via Rosetta 2.

Author: shepmaster

src/ci/github-actions/jobs.yml

@@ -23,10 +23,6 @@ runners:
     <<: *base-job
 
   - &job-macos
-    os: macos-13
-    <<: *base-job
-
-  - &job-macos-m1
     os: macos-14
     <<: *base-job
 
@@ -68,17 +64,6 @@ 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
-    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
-    MACOSX_STD_DEPLOYMENT_TARGET: 10.12
-    SELECT_XCODE: /Applications/Xcode_15.2.app
-    NO_LLVM_ASSERTIONS: 1
-    NO_DEBUG_ASSERTIONS: 1
-    NO_OVERFLOW_CHECKS: 1
-
   production:
     &production
     DEPLOY_BUCKET: rust-lang-ci2
@@ -482,17 +467,6 @@ auto:
       NO_LLVM_ASSERTIONS: 1
       NO_DEBUG_ASSERTIONS: 1
       NO_OVERFLOW_CHECKS: 1
-    <<: *job-macos-m1
-
-  - name: x86_64-apple-1
-    env:
-      <<: *env-x86_64-apple-tests
-    <<: *job-macos
-
-  - name: x86_64-apple-2
-    env:
-      SCRIPT: ./x.py --stage 2 test tests/ui tests/rustdoc
-      <<: *env-x86_64-apple-tests
     <<: *job-macos
 
   - name: dist-aarch64-apple
@@ -517,7 +491,7 @@ auto:
       NO_OVERFLOW_CHECKS: 1
       DIST_REQUIRE_ALL_TOOLS: 1
       CODEGEN_BACKENDS: llvm,cranelift
-    <<: *job-macos-m1
+    <<: *job-macos
 
   - name: aarch64-apple
     env:
@@ -537,7 +511,7 @@ auto:
       NO_LLVM_ASSERTIONS: 1
       NO_DEBUG_ASSERTIONS: 1
       NO_OVERFLOW_CHECKS: 1
-    <<: *job-macos-m1
+    <<: *job-macos
 
   ######################
   #  Windows Builders  #