Properly handle build of PRD image when constraint build failed (#49259)

When PROD image build failed with constraints, PROD image build
falls back to non-constraint build - as of recently it is using
`uv sync` but by default `uv sync` does not use active virtualenv
but the .venv build in current directory - uv needs --active flag
in order to use active virtualenv instead. This PR adds --active
flag when LOCAL_VIRTUALENV is set - i.e. during the PROD build
in this case.