schemachanger: support CREATE SCHEMA ... AUTHORIZATION

[annrpom]

This patch enables support for CREATE SCHEMA ... AUTHORIZATION in the declarative schema changer

Fixes: #115369
Epic: CRDB-31331

Release note: None

[blathers-crl]

It looks like your PR touches production code but doesn't add or edit any test code. Did you consider adding tests to your PR?

_{🦉 Hoot! I am a Blathers, a bot for CockroachDB. My owner is dev-inf.}

[cockroach-teamcity]

This change is 

[annrpom]

Is there a reason as to why CREATE SCHEMA isn't enabled? It's version gated by 23.2

[annrpom]

^ from the above comment:

cockroach/pkg/sql/schemachanger/scbuild/internal/scbuildstmt/process.go

Line 67 in ee94b81

reflect.TypeOf((*tree.CreateSchema)(nil)): {fn: CreateSchema, statementTags: []string{tree.CreateSchemaTag}, on: false, checks: isV232Active},

[annrpom]

Apologies for the hoarding on this one - prioritized on-call duties, but finally got to testing last week to make sure I'm not missing anything obvious. RFAL

[fqazi]

Reviewed 2 of 2 files at r1.
Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @annrpom, @herkolategan, and @srosenberg)

---

pkg/sql/schemachanger/scbuild/internal/scbuildstmt/create_schema.go line 74 at r1 (raw file):

	owner := b.CurrentUser()
	if !n.AuthRole.Undefined() {
		authRole, err := decodeusername.FromRoleSpec(

It would be nice to get an end to end test to cover this.

[annrpom]

Is there a reason as to why CREATE SCHEMA isn't enabled? It's version gated by 23.2

As discussed in our team weekly, we have an issue out to do exactly this (enable CREATE SCHEMA). I'll leave out commit 2 since it relies on said issue

[annrpom]

It would be nice to get an end to end test to cover this.

Done!

[fqazi]

Reviewed 7 of 7 files at r3, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @annrpom, @herkolategan, and @srosenberg)

[annrpom]

TFTR! ('-')7

bors r=fqazi

[craig]

Build succeeded:

• Bazel Essential CI (Cockroach)