Fix: [CI] force a CMake minimum version of 3.5 for all dependencies (#13936)

With CMake 4.0.0, any project < 3.5 is no longer supported. Yet,
some projects indicate 3.0 or 3.1 (while fully compatible with
3.5+). But CMake doesn't know, so it bails.

.github/workflows/release-docs.yml

@@ -43,7 +43,10 @@ jobs:
         cd ${GITHUB_WORKSPACE}/build
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo \
           -DOPTION_DOCS_ONLY=ON \
           # EOF

.github/workflows/release-linux.yml

@@ -136,7 +136,10 @@ jobs:
         cd build
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -DCMAKE_TOOLCHAIN_FILE=/vcpkg/scripts/buildsystems/vcpkg.cmake \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo \
           -DOPTION_SURVEY_KEY=${{ inputs.survey_key }} \

.github/workflows/release-macos.yml

@@ -74,7 +74,10 @@ jobs:
         cd build-host
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo \
           -DOPTION_TOOLS_ONLY=ON \
           # EOF
@@ -101,7 +104,10 @@ jobs:
         cd build-arm64
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -DCMAKE_OSX_ARCHITECTURES=arm64 \
           -DVCPKG_TARGET_TRIPLET=arm64-osx \
           -DCMAKE_TOOLCHAIN_FILE=${{ runner.temp }}/vcpkg/scripts/buildsystems/vcpkg.cmake \
@@ -122,7 +128,10 @@ jobs:
         cd build-x64
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -DCMAKE_OSX_ARCHITECTURES=x86_64 \
           -DVCPKG_TARGET_TRIPLET=x64-osx \
           -DCMAKE_TOOLCHAIN_FILE=${{ runner.temp }}/vcpkg/scripts/buildsystems/vcpkg.cmake \

.github/workflows/release-windows.yml

@@ -84,7 +84,10 @@ jobs:
         cd build-host
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -GNinja \
           -DOPTION_TOOLS_ONLY=ON \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo \
@@ -108,7 +111,10 @@ jobs:
         cd build
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -GNinja \
           -DVCPKG_TARGET_TRIPLET=${{ matrix.arch }}-windows-static \
           -DCMAKE_TOOLCHAIN_FILE="${{ runner.temp }}\vcpkg\scripts\buildsystems\vcpkg.cmake" \
@@ -138,7 +144,10 @@ jobs:
         cd build
 
         echo "::group::CMake"
-        cmake ${GITHUB_WORKSPACE} \
+        # CMake 4.0.0 deprecated < 3.5, but some vcpkg packages still use it.
+        # Yet, they are fully compatible with 3.5, and so there is no problem
+        # forcing them to upgrade.
+        CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake ${GITHUB_WORKSPACE} \
           -GNinja \
           -DVCPKG_TARGET_TRIPLET=${{ matrix.arch }}-windows-static \
           -DCMAKE_TOOLCHAIN_FILE="${{ runner.temp }}\vcpkg\scripts\buildsystems\vcpkg.cmake" \