add packer init now using packer plugins

Author: sjpb

.github/workflows/fatimage.yml

@@ -54,6 +54,7 @@ jobs:
           . venv/bin/activate
           . environments/${{ matrix.cloud }}/activate
           cd packer/
+          packer init
           PACKER_LOG=1 packer build -only openstack.fatimage -on-error=ask -var-file=$PKR_VAR_environment_root/builder.pkrvars.hcl openstack.pkr.hcl
 
       - name: Get created image name from manifest

.github/workflows/stackhpc.yml

@@ -141,6 +141,7 @@ jobs:
           . venv/bin/activate
           . environments/${{ matrix.cloud }}/activate
           cd packer/
+          packer init
           PACKER_LOG=1 packer build -except openstack.fatimage -on-error=ask -var-file=$PKR_VAR_environment_root/builder.pkrvars.hcl openstack.pkr.hcl
           ../dev/output_manifest.py packer-manifest.json # Sets NEW_COMPUTE_IMAGE_ID outputs