[TCGC] pagingMetadata contains undefined, on lropaging, in 0.59.0-dev.5

[weidongxu-microsoft]

Describe the bug

On 0.59.0-dev.5 (with other libs in dev too), element in segments in pagingMetadata is undefined.

Reproduction

Test case, operation of lropaging

0.58.0 is correct.

Checklist

• Follow our Code of Conduct
• Check that this issue is about the Azure libraries for typespec. For bug in the typespec language or core libraries file it in the TypeSpec repo
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.