fix: use macos-13 for runners

macos-15 uses too new a version of python which lacks support for `pipes`, which is used by our old foreign_cc version.

```
rules_foreign_cc: Printing build logs:
  /bin/bash -c bazel-out/darwin_arm64-opt-exec-2B5CBBC6-ST-1710242dce5b/bin/external/rules_foreign_cc/toolchains/ninja_tool_foreign_cc/wrapper_build_script.sh)
_____ BEGIN BUILD LOGS _____
+ ./configure.py --bootstrap
Traceback (most recent call last):

  File "/private/var/tmp/_bazel_runner/f7b5b126cb65bf12475e292acf07553d/sandbox/darwin-sandbox/120/execroot/proxy_wasm_cpp_host/bazel-out/darwin_arm64-opt-exec-2B5CBBC6-ST-1710242dce5b/bin/external/rules_foreign_cc/toolchains/ninja.build_tmpdir/./configure.py", line 26, in <module>
    import pipes
ModuleNotFoundError: No module named 'pipes'
```

Signed-off-by: Matt Leon <[email protected]>

Author: leonm1

.bazelrc

@@ -75,10 +75,10 @@ build:hermetic --extra_toolchains @emsdk//emscripten_toolchain:cc-toolchain-wasm
 build:hermetic-llvm --config=hermetic
 build:hermetic-llvm --extra_toolchains @llvm_toolchain//:cc-toolchain-x86_64-linux
 
-build:hermetic-llvm-macos-aarch64 --config=hermetic
-build:hermetic-llvm-macos-aarch64 --extra_toolchains @llvm_toolchain//:cc-toolchain-aarch64-darwin
+build:hermetic-llvm-macos-x86_64 --config=hermetic
+build:hermetic-llvm-macos-x86_64 --extra_toolchains @llvm_toolchain//:cc-toolchain-x86_64-darwin
 # Below flags mitigate https://github.com/bazel-contrib/toolchains_llvm/pull/229.
-build:hermetic-llvm-macos-aarch64 --features=-libtool
+build:hermetic-llvm-macos-x86_64 --features=-libtool
 
 build:hermetic-llvm --incompatible_enable_cc_toolchain_resolution
 build:hermetic-llvm --action_env BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1

.github/workflows/test.yml

@@ -178,10 +178,10 @@ jobs:
         - name: 'V8 on macOS/x86_64'
           engine: 'v8'
           repo: 'v8'
-          os: macos-15
+          os: macos-13
           arch: x86_64
           action: test
-          flags: --config=hermetic-llvm-macos-amd64
+          flags: --config=hermetic-llvm-macos-x86_64
           cache: true
         - name: 'WAMR interp on Linux/x86_64'
           engine: 'wamr-interp'
@@ -195,6 +195,7 @@ jobs:
           repo: 'com_github_bytecodealliance_wasm_micro_runtime'
           os: macos-13
           arch: x86_64
+          flags: --config=hermetic-llvm-macos-x86_64
           action: test
         - name: 'WAMR jit on Linux/x86_64'
           engine: 'wamr-jit'
@@ -211,6 +212,7 @@ jobs:
           os: macos-13
           arch: x86_64
           action: test
+          flags: --config=hermetic-llvm-macos-x86_64
           cache: true
         - name: 'WasmEdge on Linux/x86_64'
           engine: 'wasmedge'
@@ -224,6 +226,7 @@ jobs:
           repo: 'com_github_wasmedge_wasmedge'
           os: macos-13
           arch: x86_64
+          flags: --config=hermetic-llvm-macos-x86_64
           action: test
         - name: 'Wasmtime on Linux/x86_64'
           engine: 'wasmtime'
@@ -262,6 +265,7 @@ jobs:
           repo: 'com_github_bytecodealliance_wasmtime'
           os: macos-13
           arch: x86_64
+          flags: --config=hermetic-llvm-macos-x86_64
           action: test
 
     steps: