upgrade macos CI to Monterey, and simplify device build matrix

Author: tayloraswift

.github/workflows/build-devices.yml

@@ -7,39 +7,16 @@ on:
         branches: [ master ]
 
 jobs:
-    build-ios:
+    build-macos:
         runs-on: ${{ matrix.os }}
         strategy:
             matrix:
-                os: [macos-11, macos-10.15]
+                os: [macos-12, macos-11]
+                device: [ios, tvos, watchos]
         steps:
             -   uses: actions/checkout@v2
             -   name: build 
                 run: |
                     swift --version
-                    xcrun xcodebuild build -scheme "CRC"  -destination "generic/platform=ios"
-                    xcrun xcodebuild build -scheme "SHA2" -destination "generic/platform=ios"
-    build-tvos:
-        runs-on: ${{ matrix.os }}
-        strategy:
-            matrix:
-                os: [macos-11, macos-10.15]
-        steps:
-            -   uses: actions/checkout@v2
-            -   name: build 
-                run: |
-                    swift --version
-                    xcrun xcodebuild build -scheme "CRC"  -destination "generic/platform=tvos"
-                    xcrun xcodebuild build -scheme "SHA2" -destination "generic/platform=tvos"
-    build-watchos:
-        runs-on: ${{ matrix.os }}
-        strategy:
-            matrix:
-                os: [macos-11, macos-10.15]
-        steps:
-            -   uses: actions/checkout@v2
-            -   name: build 
-                run: |
-                    swift --version
-                    xcrun xcodebuild build -scheme "CRC"  -destination "generic/platform=watchos"
-                    xcrun xcodebuild build -scheme "SHA2" -destination "generic/platform=watchos"
+                    xcrun xcodebuild build -scheme "CRC"  -destination "generic/platform=${{ matrix.device }}"
+                    xcrun xcodebuild build -scheme "SHA2" -destination "generic/platform=${{ matrix.device }}"

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
         runs-on: ${{ matrix.os }}
         strategy:
             matrix:
-                os: [macos-11, macos-10.15]
+                os: [macos-12, macos-11]
         steps:
             -   uses: actions/checkout@v2
             -   name: build