refactor: refactor static regex out of for loops (#13065)

lib/config/decrypt.ts

lib/config/migration.ts

lib/config/validation.ts

lib/datasource/artifactory/index.ts

lib/datasource/github-releases/digest.ts

lib/datasource/maven/index.ts

lib/datasource/pod/index.ts

lib/datasource/pypi/index.ts

lib/datasource/sbt-package/index.ts

lib/datasource/sbt-plugin/index.ts

lib/manager/ansible-galaxy/extract.ts

lib/manager/buildkite/extract.ts

lib/manager/bundler/extract.ts

lib/manager/circleci/extract.ts

lib/manager/cocoapods/extract.ts

lib/manager/composer/extract.ts

lib/manager/droneci/extract.ts

lib/manager/git-submodules/extract.ts

lib/manager/gitlabci-include/extract.ts

lib/manager/gitlabci/extract.ts