Add param options to NavList truncate example

[TylerJDev]

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What are you trying to accomplish?

• Adds param options to "Long Label Truncate No Tooltip" preview

List the issues that this change affects.

Closes https://github.com/github/primer/issues/4724

Risk Assessment

• Low risk the change is small, highly observable, and easily rolled back.
• Medium risk changes that are isolated, reduced in scope or could impact few users. The change will not impact library availability.
• High risk changes are those that could impact customers and SLOs, low or no test coverage, low observability, or slow to rollback.

What approach did you choose and why?

Adds param options to "Long Label Truncate No Tooltip" preview so that consumers have the ability to see other options available.

Anything you want to highlight for special attention from reviewers?

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Lookbook)
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

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Latest commit: 30fa833

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