Core: Use HEAD request to check if view exists

[nastra]

No description provided.

[nastra]

@Fokko since you reviewed #10999 already, could you review this one please?

[Fokko]

Looks good to me, thanks for adding this @nastra

Spec ref:

iceberg/open-api/rest-catalog-open-api.yaml

Line 1691 in 6c05f35

head:

[amogh-jahagirdar]

Could we add a test to TestRESTCatalog that makes sure the client is issuing a head request when checking if a view exists? Other than that the changes themselves look good to me

[nastra]

@amogh-jahagirdar good point, I've added a test to TestRESTViewCatalog as that's the more appropriate place to check this (instead of TestRESTCatalog)

[amogh-jahagirdar]

Awesome, thanks for fixing this @nastra , thanks @Fokko @ebyhr for reviewing! I'll merge when checks pass