Make src_name configurable

Author: AaronDewes

.github/workflows/build-containers.yml

@@ -69,6 +69,7 @@ jobs:
             has_custom_build_script: true
           - container: standalone-db-migrator
             build_binary: migrate
+            src_name: migration
           - container: trivy-adapter
             has_custom_build_script: true
 
@@ -100,7 +101,7 @@ jobs:
         if: ${{ matrix.build_binary != '' }}
         run: |
           cd src/github.com/goharbor/harbor
-          docker run --rm -v .:/harbor -w /harbor/src/${{ matrix.container }} golang:1.24.6 /usr/local/go/bin/go build -buildvcs=false -o make/photon/${{ matrix.container }}/${{matrix.build_binary}} ${ADDITIONAL_GO_FLAGS:-}
+          docker run --rm -v .:/harbor -w /harbor/src/${{ matrix.src_name || matrix.container}} golang:1.24.6 /usr/local/go/bin/go build -buildvcs=false -o make/photon/${{ matrix.container }}/${{matrix.build_binary}} ${ADDITIONAL_GO_FLAGS:-}
       - name: Run custom build script
         if: ${{ matrix.has_custom_build_script == true }}
         run: |