sql/schemachanger: add a type for RuleName

[ajwerner]

This lets it avoid getting redacted.

Release note: None

[cockroach-teamcity]

This change is 

[chengxiong-ruan]

I'm actually curious when does redactions happen? I've seen something like this and I've heard people talking about it, but I don't when a string should be redacted and what's the consequences of being redacted...:

cockroach/pkg/sql/protoreflect/redact.go

Line 58 in 55480ac

var redactionJSONBMarker = func() jsonb.JSON {

Reviewable status: complete! 1 of 0 LGTMs obtained

[postamar]

Some customers have their logs redacted due to security policies, and the redaction is opt-in by default so it can make the log output challenging to read sometimes. Also, sentry reports will always have redacted logs, see for example #80176

[ajwerner]

TFTR!

bors r+

[craig]

Build succeeded:

• GitHub CI (Cockroach)