This is a first pass to improve the way errors are handled and raised in
bundler's tests. The goal is to clean up tests and modernize them -
these were some obvious areas that could be cleaned up.

- Instead of raising "ZOMG" in the load error tests, it now tests for
the actual error and gem raising.
- Improve error messages where applicable.
- All errors raise a specific error class, rather than falling back to a
default and just setting a message.
- Removed arguments and `bundle_dir` option from `TheBundle` class as it wasn't
actually used so therefore we don't need to raise an error for extra
arguments.
- Removed error from `BundlerBuilder`, as it won't work if it's not
`bundler`, also it never uses `name`. The only reaon `name` is passed
in is because of metaprogramming on loading the right builder. I
think that should eventually be refactored.
- Replaced and removed `update_repo3` and `update_repo4` in favor of
just `build_repo3` and `build_repo4`. Rather than tell someone writing
tests to use a different method, automatically use the right method.

https://github.com/ruby/rubygems/commit/68c39c8451

https://github.com/ruby/rubygems/commit/d3baf4110e

The "ignore" attribute is a RubyGems thing to mark when a installed gem
should be ignored for activation because its extensions are not properly
compiled.

In the case of gems from path sources, the warning is not accurate
because extensions are compiled into the local lib path, which is not
where RubyGems leaves its sentinel `gem.build_complete` file.

Also, there's a single version of each gem in the path source available
to Bundler, so we always certainly want to consider that for activation
and never makes sense to ignore it.

https://github.com/rubygems/rubygems/commit/ec5d33695e

https://github.com/rubygems/rubygems/commit/bb13f4e702

- the x64-mingw32 platform has been superseded by x64-mingw-ucrt
- the mingw-ucrt platform is present as of Windows 10, which was released 10 years ago in 2015 and all versions prior to 10 are end-of-life and 10 will be by mid October 2025
- newer rubies use the mingw-ucrt platform instead of the mingw32 platform, meaning using the deprecated platform can cause issues during gem installation

https://github.com/rubygems/rubygems/commit/b9d871022e

https://github.com/rubygems/rubygems/commit/ffabab65f2

https://github.com/rubygems/rubygems/commit/96496e3f53

Co-authored-by: Johnny Shields <johnny.shields@gmail.com>

I think they add unnecessary indirection and inconsistency to the specs.

https://github.com/rubygems/rubygems/commit/609924d985

Signed-off-by: Samuel Giddins <segiddins@segiddins.me>

https://github.com/rubygems/rubygems/commit/06eec6d855

And get specs passing.

https://github.com/rubygems/rubygems/commit/c23b5f5b84