fix(unified-storage): use the provided connection config parameters (#107455)

* fix(unified-storage): use the provided connection config parameters

* extend tests

* make update-workspace

pkg/storage/unified/sql/db/dbimpl/util.go

@@ -18,6 +18,7 @@ type confGetter interface {
 	Err() error
 	Bool(key string) bool
 	String(key string) string
+	Int(key string, def int) int
 }
 
 func newConfGetter(ds *setting.DynamicSection, keyPrefix string) confGetter {
@@ -52,6 +53,10 @@ func (g *sectionGetter) String(key string) string {
 	return v
 }
 
+func (g *sectionGetter) Int(key string, def int) int {
+	return g.ds.Key(g.keyPrefix + key).MustInt(def)
+}
+
 // MakeDSN creates a DSN from the given key/value pair. It validates the strings
 // form valid UTF-8 sequences and escapes values if needed.
 func MakeDSN(m map[string]string) (string, error) {