fix(docker): move autoReplaceStringTemplate (#6024)

lib/datasource/docker/index.ts

lib/manager/ansible/__snapshots__/extract.spec.ts.snap

lib/manager/circleci/__snapshots__/extract.spec.ts.snap

lib/manager/common.ts

...manager/docker-compose/__snapshots__/extract.spec.ts.snap

lib/manager/dockerfile/__snapshots__/extract.spec.ts.snap

lib/manager/dockerfile/extract.ts

lib/manager/droneci/__snapshots__/extract.spec.ts.snap

...manager/github-actions/__snapshots__/extract.spec.ts.snap

lib/manager/gitlabci/__snapshots__/extract.spec.ts.snap

lib/manager/helm-values/__snapshots__/extract.spec.ts.snap

lib/manager/helm-values/extract.ts

lib/manager/kubernetes/__snapshots__/extract.spec.ts.snap