feat: minimumConfidence (experimental, non-public) (#10313)

lib/config/definitions.ts

lib/config/validation.ts

lib/util/merge-confidence/index.spec.ts

lib/util/merge-confidence/index.ts

lib/workers/branch/__snapshots__/index.spec.ts.snap

lib/workers/branch/index.spec.ts

lib/workers/branch/index.ts

lib/workers/branch/status-checks.spec.ts

lib/workers/branch/status-checks.ts

...y/process/lookup/__snapshots__/filter-checks.spec.ts.snap

lib/workers/repository/process/lookup/filter-checks.spec.ts

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

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

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

lib/workers/types.ts