Chore (sqlstore): add validation and testing for repl config (#90683)

* add some validation and testing for repl cf
* connection strings are secrets

pkg/services/sqlstore/replstore.go

@@ -2,6 +2,7 @@ package sqlstore
 
 import (
 	"errors"
+	"fmt"
 	"regexp"
 	"sync/atomic"
 	"time"
@@ -84,6 +85,10 @@ func ProvideServiceWithReadReplica(primary *SQLStore, cfg *setting.Cfg,
 		return nil, err
 	}
 
+	if err := validateReplicaConfigs(primary.dbCfg, replCfgs); err != nil {
+		return nil, fmt.Errorf("failed to validate replica configurations: %w", err)
+	}
+
 	if len(replCfgs) > 0 {
 		replStore.repls = make([]*SQLStore, len(replCfgs))
 	}