Fix builds to macos-13 rather than latest due to bootstrap python incompatibilities (#33142)

Author: andy31415

.github/workflows/build.yaml

@@ -371,7 +371,7 @@ jobs:
 
     build_darwin:
         name: Build on Darwin (clang, python_lib, simulated)
-        runs-on: macos-latest
+        runs-on: macos-13
         if: github.actor != 'restyled-io[bot]'
 
         steps:

.github/workflows/fuzzing-build.yaml

@@ -72,7 +72,7 @@ jobs:
 
     build_darwin_fuzzing:
         name: Build on Darwin
-        runs-on: macos-latest
+        runs-on: macos-13
         if: github.actor != 'restyled-io[bot]'
 
         steps:

.github/workflows/tests.yaml

@@ -299,7 +299,7 @@ jobs:
             LSAN_OPTIONS: detect_leaks=1 suppressions=scripts/tests/chiptest/lsan-mac-suppressions.txt
 
         if: github.actor != 'restyled-io[bot]'
-        runs-on: macos-latest
+        runs-on: macos-13
 
         steps:
             - name: Checkout
@@ -501,7 +501,7 @@ jobs:
             TSAN_OPTIONS: "halt_on_error=1"
 
         if: github.actor != 'restyled-io[bot]' && false
-        runs-on: macos-latest
+        runs-on: macos-13
 
         steps:
             - name: Checkout