feat: add `bazel` datasource (#21733)

lib/modules/datasource/api.ts

...ource/bazel/__fixtures__/metadata-no-yanked-versions.json

...rce/bazel/__fixtures__/metadata-with-yanked-versions.json

lib/modules/datasource/bazel/index.spec.ts

lib/modules/datasource/bazel/index.ts

lib/modules/datasource/bazel/readme.md

lib/modules/datasource/bazel/schema.spec.ts

lib/modules/datasource/bazel/schema.ts

lib/modules/versioning/bazel-module/bzlmod-version.ts