refactor(maven): Remove file protocol support from datasource (#10191)

lib/datasource/clojure/__snapshots__/index.spec.ts.snap

lib/datasource/clojure/index.spec.ts

lib/datasource/maven/__snapshots__/index.spec.ts.snap

lib/datasource/maven/index.spec.ts

lib/datasource/maven/index.ts

lib/datasource/maven/util.ts