Codechange: [CI] manually install vcpkg for all targets (#12241)

From macos-14, vcpkg is no longer installed on the runner-image.
It stands to reason that this will also roll out to new images
for other OSes. To be pre-emptive about it, start using our own
cloned vcpkg for all targets.

.github/workflows/release-macos.yml

@@ -40,6 +40,11 @@ jobs:
           core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
           core.exportVariable('VCPKG_BINARY_SOURCES', 'clear;x-gha,readwrite')
 
+    - name: Install vcpkg
+      run: |
+        git clone https://github.com/microsoft/vcpkg
+        ./vcpkg/bootstrap-vcpkg.sh -disableMetrics
+
     - name: Install dependencies
       env:
         HOMEBREW_NO_AUTO_UPDATE: 1
@@ -94,7 +99,7 @@ jobs:
         cmake ${GITHUB_WORKSPACE} \
           -DCMAKE_OSX_ARCHITECTURES=arm64 \
           -DVCPKG_TARGET_TRIPLET=arm64-osx \
-          -DCMAKE_TOOLCHAIN_FILE=/usr/local/share/vcpkg/scripts/buildsystems/vcpkg.cmake \
+          -DCMAKE_TOOLCHAIN_FILE=${GITHUB_WORKSPACE}/vcpkg/scripts/buildsystems/vcpkg.cmake \
           -DHOST_BINARY_DIR=${GITHUB_WORKSPACE}/build-host \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo \
           -DOPTION_SURVEY_KEY=${{ inputs.survey_key }} \
@@ -115,7 +120,7 @@ jobs:
         cmake ${GITHUB_WORKSPACE} \
           -DCMAKE_OSX_ARCHITECTURES=x86_64 \
           -DVCPKG_TARGET_TRIPLET=x64-osx \
-          -DCMAKE_TOOLCHAIN_FILE=/usr/local/share/vcpkg/scripts/buildsystems/vcpkg.cmake \
+          -DCMAKE_TOOLCHAIN_FILE=${GITHUB_WORKSPACE}/vcpkg/scripts/buildsystems/vcpkg.cmake \
           -DHOST_BINARY_DIR=${GITHUB_WORKSPACE}/build-host \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo \
           -DOPTION_SURVEY_KEY=${{ inputs.survey_key }} \