kvdb/sqlbase: use positive+negative build tags for new sql error parsing

In this commit, we use exhaustive build tags to ensure that we can
always build the `sqlbase` package, independent of the set build tags.
To do this, we move the type declarations _into_ the parsing functions.
This then allows us to create two versions for each db: with the db, and
without it.

To avoid a module tag round trip to get this working, we use a local
replace for now. Once this is merged in, we can do the tag (along side
rc3), then remove the replace.

go.mod

@@ -208,6 +208,8 @@ replace github.com/gogo/protobuf => github.com/gogo/protobuf v1.3.2
 // allows us to specify that as an option.
 replace google.golang.org/protobuf => github.com/lightninglabs/protobuf-go-hex-display v1.30.0-hex-display
 
+replace github.com/lightningnetwork/lnd/kvdb => ./kvdb
+
 // If you change this please also update .github/pull_request_template.md and
 // docs/INSTALL.md.
 go 1.19