.gitlab/ci/build-inside-vm.sh:
Change the build script to provide the build artifacts and metrics in the top-level output directory.
This goes in line with the soon to be used ci-scripts, allowing code sharing amongst several projects.
.gitlab/ci/build_archiso.sh:
Rename .gitlab/ci/build-inside-vm.sh to .gitlab/ci/build_archiso.sh.
.gitlab-ci.yml:
Rename BUILD_SCRIPT to build_archiso.sh.