feat: split sbt datasource (#5586)

lib/constants/data-binary-source.ts

lib/datasource/common.ts

lib/datasource/sbt-package/__fixtures__/maven-index.html

...atasource/sbt-package/__fixtures__/sbt-plugins-index.html

lib/datasource/sbt-package/__snapshots__/index.spec.ts.snap

lib/datasource/sbt-package/index.spec.ts

lib/datasource/sbt-package/index.ts

lib/datasource/sbt-plugin/__fixtures__/maven-index.html

...datasource/sbt-plugin/__fixtures__/sbt-plugins-index.html

lib/datasource/sbt-plugin/__snapshots__/index.spec.ts.snap

lib/datasource/sbt-plugin/index.spec.ts

lib/datasource/sbt-plugin/index.ts

lib/datasource/sbt-plugin/util.ts

lib/manager/gradle/__snapshots__/index.spec.ts.snap

lib/manager/gradle/gradle-updates-report.ts

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

lib/manager/sbt/extract.ts