[Docker] Crunch Docker images need libcurl4-gnutls-dev to support arvados_sdk_version
You need this package to build pycurl, which is needed to install recent PySDKs. Without it, the build fails when it can't find curl-config.
- Add this package to the arvados/jobs build, since we want that to be able to support arvados_sdk_version.
7321: arvados/jobs Dockerfile installs development headers.
These are necessary to build all of the Python SDK's dependencies when
running a job that defines arvados_sdk_version.