KongPlugin/Correlation-ID: Add UUIDv7 as an option

[cptjacky]

Hello!

Correlation IDs are very useful when trying to debug what happened in a specific request. However, the proposed options are not database-indexes friendly due to the random nature of UUIDs.

UUIDv7 was officially added to the UUID standard and has a unix_ts_ms as its first 48 bytes, allowing for efficient indexing in most databases!

I believe adding an UUIDv7 option to the correlation-id plugin would be of great value to a lot of users!

Thank you!