DBPW - Enables AutoMTLS for DB plugins (#10220)

This also temporarily disables couchbase, elasticsearch, and
mongodbatlas because the `Serve` function needs to change signatures
and those plugins are vendored in from external repos, causing problems
when building.

plugins/database/redshift/redshift-database-plugin/main.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/hashicorp/vault/api"
 	"github.com/hashicorp/vault/plugins/database/redshift"
+	"github.com/hashicorp/vault/sdk/database/dbplugin"
 )
 
 func main() {
@@ -13,8 +14,20 @@ func main() {
 	flags := apiClientMeta.FlagSet()
 	flags.Parse(os.Args[1:])
 
-	if err := redshift.Run(apiClientMeta.GetTLSConfig()); err != nil {
+	if err := Run(apiClientMeta.GetTLSConfig()); err != nil {
 		log.Println(err)
 		os.Exit(1)
 	}
 }
+
+// Run instantiates a RedShift object, and runs the RPC server for the plugin
+func Run(apiTLSConfig *api.TLSConfig) error {
+	dbType, err := redshift.New(true)()
+	if err != nil {
+		return err
+	}
+
+	dbplugin.Serve(dbType.(dbplugin.Database), api.VaultPluginTLSProvider(apiTLSConfig))
+
+	return nil
+}

plugins/database/redshift/redshift.go

@@ -10,7 +10,6 @@ import (
 
 	"github.com/hashicorp/errwrap"
 	"github.com/hashicorp/go-multierror"
-	"github.com/hashicorp/vault/api"
 	"github.com/hashicorp/vault/sdk/database/dbplugin"
 	"github.com/hashicorp/vault/sdk/database/helper/connutil"
 	"github.com/hashicorp/vault/sdk/database/helper/credsutil"
@@ -68,18 +67,6 @@ func newRedshift(lowercaseUsername bool) *RedShift {
 	return db
 }
 
-// Run instantiates a RedShift object, and runs the RPC server for the plugin
-func Run(apiTLSConfig *api.TLSConfig) error {
-	dbType, err := New(true)()
-	if err != nil {
-		return err
-	}
-
-	dbplugin.Serve(dbType.(dbplugin.Database), api.VaultPluginTLSProvider(apiTLSConfig))
-
-	return nil
-}
-
 type RedShift struct {
 	*connutil.SQLConnectionProducer
 	credsutil.CredentialsProducer