Merge branch 'add_ci_cd' into 'main'

.gitignore

.gitlab-ci.yml

integration_tests/ddecal.parset

integration_tests/dp3_ddecal.sh

modules/dp3/cicd

modules/everybeam/cicd

scripts/build.sh

scripts/configure.sh

scripts/parse_dp3_output.py

scripts/run_test.sh

spack-env/spack.yaml