Setup CI for sylva-units-operator

Provide gitlab-ci:

• renovate-config validator
• renovate-dry-run
• gitleak
• yamllint

go template from to be continuous provide:

• go-build-test (we don'thave tests yet)
• go-ci-lint
• go-vuln-check
• go-outdated-modules (manual in MR)
• go-sbom

docker template from to be continuous provide:

• docker hadolint
• docker build
• docker-sbom
• docker-trivy

close #4 (closed)