[ci] Add OVERRIDE_BUILD_OPTIONS in image build template. (#15309)

Why I did it
Set build options in pipeline UI.
Support setting reproducible build options to py2,py3 in release branch and none in master branch.

Work item tracking
Microsoft ADO (number only): 22335854
How I did it
How to verify it

.azure-pipelines/azure-pipelines-UpgrateVersion.yml

@@ -73,7 +73,7 @@ stages:
   - template: azure-pipelines-build.yml
     parameters:
       jobFilters: ${{ parameters.jobFilters }}
-      buildOptions: '${{ variables.VERSION_CONTROL_OPTIONS }} ENABLE_DOCKER_BASE_PULL=n SONIC_BUILD_JOBS=$(nproc) ENABLE_IMAGE_SIGNATURE=y $(OVERRIDE_BUILD_OPTIONS)'
+      buildOptions: '${{ variables.VERSION_CONTROL_OPTIONS }} ENABLE_DOCKER_BASE_PULL=n SONIC_BUILD_JOBS=$(nproc) ENABLE_IMAGE_SIGNATURE=y'
       preSteps:
       - template: .azure-pipelines/template-clean-sonic-slave.yml@buildimage
       - checkout: self

.azure-pipelines/azure-pipelines-image-template.yml

@@ -28,11 +28,13 @@ jobs:
       - template: .azure-pipelines/cleanup.yml@buildimage
       - ${{ parameters.preSteps }}
       - script: |
-          BUILD_OPTIONS="$(BUILD_OPTIONS)"
+          [ -n "$OVERRIDE_BUILD_OPTIONS" ] && OVERRIDE_BUILD_OPTIONS=$(OVERRIDE_BUILD_OPTIONS)
+          BUILD_OPTIONS="$(BUILD_OPTIONS) $OVERRIDE_BUILD_OPTIONS"
           if [ -n "$(CACHE_MODE)" ] && echo $(PLATFORM_AZP) | grep -E -q "^(vs|broadcom|mellanox|marvell-armhf)$"; then
             CACHE_OPTIONS="SONIC_DPKG_CACHE_METHOD=$(CACHE_MODE) SONIC_DPKG_CACHE_SOURCE=/nfs/dpkg_cache/$(PLATFORM_AZP)"
-            BUILD_OPTIONS="$(BUILD_OPTIONS) $CACHE_OPTIONS"
+            BUILD_OPTIONS="$BUILD_OPTIONS $CACHE_OPTIONS"
           fi
+          echo $BUILD_OPTIONS
           echo "##vso[task.setvariable variable=BUILD_OPTIONS]$BUILD_OPTIONS"
         displayName: "Set cache options"
       - checkout: self