Merge branch 'feat/add-plan-artifacts-input' into 'main'

templates/full-pipeline.yml

templates/plan.yml

templates/validate-plan-apply.yml

templates/validate-plan-destroy.yml

templates/validate-plan.yml

tests/iac-upload-artifacts/backend.tf

tests/iac-upload-artifacts/main.tf

...integration-tests/ExtraArtifactsAreIncluded.gitlab-ci.yml

tests/integration-tests/UploadArtifacts.gitlab-ci.yml

tests/integration.gitlab-ci.yml