schemachanger: prep work ALTER DATABASE .. CONFIGURE ZONE in DSC

[annrpom]

sqlerrors: move gloval var errNoZoneConfigApplies into sqlerrors package

This commit is a mechnical change that moves the gloval variable
errNoZoneConfigApplies from package sql to package sqlerrors, as
it will be used by the DSC when we support zone config in it.

Informs: #117574
Release note: None

---

scbuildstmt: Rerewrite a few function with better APIs

This commit cleaned up a few functions using the preferred .FilterXxx()
API to retrieve element from an element set. No functional change is
introduced.

Informs: #117574
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]

This some of Xiang's prep work for CONFIGURE ZONE (the parts that can be merged ahead of time to ease the review process)

[fqazi]

One minor nit

Reviewed 4 of 4 files at r1, 3 of 3 files at r2, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @annrpom)

---

pkg/sql/catalog/zone/zones.go line 37 at r2 (raw file):

	Field        config.Field
	RequiredType *types.T
	// Setter is used to set `Field` in the `zone config` to `datum`.

Think this needs to be in a different commit

[annrpom]

had this sitting in anticipation for when db zone configs was wrapping up (personal preference) -- just rebased and addressed nit. will merge after checks are run

[annrpom]

TFTR! ('-')7

bors r=fqazi

[craig]

Build succeeded:

• local_roachtest_fips
• unit_tests
• docker_image_amd64
• linux_amd64_fips_build
• check_generated_code
• macos_arm64_build
• lint
• linux_arm64_build
• linux_amd64_build
• windows_build
• examples_orms
• macos_amd64_build
• acceptance
• local_roachtest