refactor: rename Error location to validationSource (#10018)

lib/config/presets/index.spec.ts

lib/config/secrets.ts

lib/globals.d.ts

lib/manager/npm/extract/index.ts

lib/util/git/index.ts

lib/util/regex.ts

lib/versioning/regex/index.ts

lib/workers/repository/error-config.spec.ts

lib/workers/repository/error-config.ts

lib/workers/repository/init/merge.ts

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