fix(segment-button): allow min-width to be overridden

[liamdebeasi]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: fixes #21105

What is the new behavior?

• Users can override the min width by setting min-width on the host segment button
• In the main segment button file, .button-native has min-width: inherit, so this should not cause regressions to the default sizing of the button.

Does this introduce a breaking change?

• Yes
• No

Other information