[bazel] Clean up bazel scripts

[pjreiniger]

This is a big cleanup of some of the things Austin has seen as he is getting up to speed, as well as prep work for future efforts like publishing and eventualy bazel version upgrades.

• Clean up empty globs. incompatible_disallow_empty_glob will be enabled by default in bazel 8, and there were quite a few places that were providing no files in the 2027 branch.
• Create helper functions for dealing with the third party libraries. Just some syntactic sugar and will be helpful when doing source / header publishing
• Limit target visibility. My original implementation had more BUILD files (i.e one for java, one for c++, one for tests, etc) instead of monolithic ones per project. This resulted in a lot of targets having something like //wpiutil:__subpackages__. Since the build files are monolithic that does basically nothing, so I deleted visibility which makes it package private.
• Austin noticed a lot of things where being guarded on build with either no-roborio / manual / etc tags, because they would break during cross compilation. This updates all of those locations to use target_compatible_with instead.
• The examples json files did not correctly indicate some examples that had tests, and bazel uses the json files to generate targets.
• Adds bazel targets for cscore examples
• Adds bazel target for datalogtool. I skipped it with the gui PR because I didn't think I moved the libssh library to wpilibsuite control, but it turns out I had good foresight when transfering all those repos over.
• Deletes a multiple files that were not built by gradle. Since these were not built by gradle they have fallen severely out of date and have no chance to compile. If you like it you should have put a build target on it #BeyonceRule

With these changes the bazel coverage should be everything except wpical and ntcoreffi

[AustinSchuh]

Some quick comments before I dig in further tomorrow. Thanks for posting this!

[AustinSchuh]

Can we keep this in the wpilibsuite org? Or move it into it?

[AustinSchuh]

FYI,

[
  cc_library(name = f, ...) for f in ['a', 's' ,'d', 'f']
 ]

works in BUILD files.

[AustinSchuh]

Hey @pjreiniger , the rest of it looks good, could you address those 2 comments, then let's merge?