Install CMake 3.31.x on runners to override new GitHub default of CMake 4. (#1227)

Author: jonsimantov

.github/workflows/build_android.yml

@@ -47,6 +47,9 @@ jobs:
       CCACHE_DIR: ${{ github.workspace }}/ccache_dir
 
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - name: Checkout Unity Repo
         uses: actions/checkout@v3
         with:

.github/workflows/build_ios.yml

@@ -48,6 +48,9 @@ jobs:
       xcodeVersion: "15.1"
 
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - name: Checkout Unity Repo
         uses: actions/checkout@v3
         with:

.github/workflows/build_linux.yml

@@ -45,6 +45,9 @@ jobs:
       fail-fast: false
 
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - uses: actions/checkout@v3
         with:
           submodules: true

.github/workflows/build_macos.yml

@@ -45,6 +45,9 @@ jobs:
       fail-fast: false
 
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - uses: actions/checkout@v3
         with:
           submodules: true

.github/workflows/build_tvos.yml

@@ -69,6 +69,9 @@ jobs:
       xcodeVersion: "15.1"
 
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - name: Checkout Unity Repo
         uses: actions/checkout@v3
         with:

.github/workflows/build_windows.yml

@@ -45,6 +45,9 @@ jobs:
       fail-fast: false
 
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - uses: actions/checkout@v3
         with:
           submodules: true

.github/workflows/generate_swig.yml

@@ -36,6 +36,9 @@ jobs:
       fail-fast: false
 
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - uses: actions/checkout@v3
         with:
           submodules: true

.github/workflows/integration_tests.yml

@@ -178,6 +178,9 @@ jobs:
     env:
       xcodeVersion: "15.1"
     steps:
+      - uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: "~3.31.0"
       - id: matrix_info
         shell: bash
         run: |