Support for RTX PRO 6000 GPU on GCP.

[dakshj09]

https://docs.cloud.google.com/compute/docs/gpus#rtx-6000-gpus

As described on this page, i checked in the catalog, multiple instance types & GPUs are missing from skypilot.
Can we check and update the catalog please.

[dakshj09]

Have created a PR for this - skypilot-org/skypilot#9472