Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>

* Merge RubyGems-3.5.6 and Bundler-2.5.6

* Merge RubyGems-3.5.7 and Bundler-2.5.7

* Merge RubyGems-3.5.8 and Bundler-2.5.8

* Partly reverted about https://github.com/rubygems/rubygems/pull/7483

* Merge RubyGems-3.5.9 and Bundler-2.5.9

* Merge RubyGems-3.5.4 and Bundler-2.5.4

* Merge RubyGems-3.5.5 and Bundler-2.5.5

* Make tests play with upstream Ruby tests

CI broke in https://github.com/ruby/ruby/pull/9604 because if any Ruby
tests run `require 'net/http'`, they will pollute the
`$LOADED_FEATURES` for the RubyGems tests. We can fix this by renaming
the test default gem from `net-http` to `my-http`.

See https://github.com/rubygems/rubygems/pull/7379#issuecomment-1901241299
for more details.

---------

Co-authored-by: Stan Hu <stanhu@gmail.com>

Some specs now print the following warning:

```
/path/to/bundler/tmp/1/gems/base/ruby/3.2.0/gems/sinatra-2.0.8.1/lib/sinatra/base.rb:902: warning: constant Tilt::Cache is deprecated
```

Updating sinatra to latest & greatest fixes it.

Update other deps too since at it.

Helps ensure that unsuspecting diffs to the vendored code arent accidentally introduced

https://github.com/rubygems/rubygems/commit/7c425d49dd