refactor: Move irrelevant functions from the regex helper (#27100)

lib/config/validation.ts

lib/modules/datasource/docker/index.ts

lib/modules/platform/bitbucket/index.ts

lib/util/http/host-rules.ts

lib/util/package-rules/base-branches.ts

lib/util/package-rules/current-value.ts

lib/util/package-rules/current-version.ts

lib/util/package-rules/repositories.ts

lib/util/regex.spec.ts

lib/util/regex.ts

lib/util/string-match.spec.ts

lib/util/string-match.ts

lib/util/string.spec.ts

lib/util/string.ts

lib/workers/global/autodiscover.ts

lib/workers/repository/process/index.ts

lib/workers/repository/process/lookup/filter.ts