[Bug]: [http-spec] path is incorrect for url template cases under routes

[MaryGao]

Describe the bug

See paths in spec https://github.com/microsoft/typespec/blob/main/packages/http-specs/specs/routes/mockapi.ts#L81-L134, some are incorrect.

For example in case Scenarios.Routes_PathParameters_MatrixExpansion_Explode_record it should be /routes/path/matrix/explode/record;a=1;b=2 but got /routes/matrix/standard/record;a=1;b=2.

Reproduction

NA

Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.