refactor(datasource): prefer packageName over depName in datasource (#20221)

lib/modules/datasource/common.ts

lib/workers/repository/process/fetch.ts

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

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

...ory/update/pr/changelog/__snapshots__/github.spec.ts.snap

...ory/update/pr/changelog/__snapshots__/gitlab.spec.ts.snap

...tory/update/pr/changelog/__snapshots__/index.spec.ts.snap

lib/workers/repository/update/pr/changelog/github.spec.ts

lib/workers/repository/update/pr/changelog/gitlab.spec.ts

lib/workers/repository/update/pr/changelog/index.spec.ts

...kers/repository/update/pr/changelog/release-notes.spec.ts

lib/workers/repository/update/pr/changelog/release-notes.ts

lib/workers/repository/update/pr/changelog/source-github.ts

lib/workers/repository/update/pr/changelog/source-gitlab.ts

lib/workers/repository/update/pr/changelog/types.ts