Ability to handle ignored groups

Nobody has claimed this yet.

`bundle update-interactive` is a huge productivity boost, but I've found a case where it seems like it falls down (unless I'm missing something).

I have this in the Gemfile of an app I'm trying to upgrade,

```ruby
group :oracle do
gem "activerecord-oracle_enhanced-adapter", "~> 7.0"
gem "ruby-oci8"
end
```

and I get the following error when I run `bundle update-interactive`:

```shell
Resolving latest gem versions...
Could not find gem 'activerecord-oracle_enhanced-adapter', because it's in the group 'oracle', configured to be ignored.
/Users/brandon/.rbenv/versions/3.3.5/lib/ruby/gems/3.3.0/gems/bundle_update_interactive-0.8.1/lib/bundle_update_interactive/bundler_commands.rb:32:in `parse_outdated': bundle outdated command failed (RuntimeError)
from /Users/brandon/.rbenv/versions/3.3.5/lib/ruby/gems/3.3.0/gems/bundle_update_interactive-0.8.1/lib/bundle_update_interactive/updater.rb:55:in `find_withheld_gems'
from /Users/brandon/.rbenv/versions/3.3.5/lib/ruby/gems/3.3.0/gems/bundle_update_interactive-0.8.1/lib/bundle_update_interactive/updater.rb:13:in `generate_report'
from /Users/brandon/.rbenv/versions/3.3.5/lib/ruby/gems/3.3.0/gems/bundle_update_interactive-0.8.1/lib/bundle_update_interactive/cli.rb:60:in `generate_report'
from /Users/brandon/.rbenv/versions/3.3.5/lib/ruby/gems/3.3.0/gems/bundle_update_interactive-0.8.1/lib/bundle_update_interactive/cli.rb:9:in `run'
from /Users/brandon/.rbenv/versions/3.3.5/lib/ruby/gems/3.3.0/gems/bundle_update_interactive-0.8.1/exe/bundler-update-interactive:6:in `'
from /Users/brandon/.rbenv/versions/3.3.5/bin/bundler-update-interactive:25:in `load'
from /Users/brandon/.rbenv/versions/3.3.5/bin/bundler-update-interactive:25:in `'
```

Reproduce the failure with the shown Gemfile and an ignored `oracle` group using `bundle update-interactive`. Trace `parse_outdated` in `bundler_commands.rb`, then `find_withheld_gems` in `updater.rb`, to understand how ignored groups are passed to Bundler. Done means the command handles ignored groups without raising the reported error.

Written by the indexing model from the issue text.