Throw error if both deps_exclude and deps_exclude_paths are specified

[plaird]

If you define both attributes, only deps_exclude_paths is honored and we silently ignore deps_exclude. Throw an error instead.

[plaird]

This is not true. We have many cases where we specify both, on internal projects.

This is the code:
https://github.com/salesforce/rules_spring/blob/main/springboot/springboot.bzl#L46