[#1253] deleteSvc: Use copy of common parameters

getSvc may change the values of some fields, so Head will affect Delete
or Put. In this case, the change is necessary so that the session token
is stored in the tombstone object (EC assemble calls `ForgetTokens`).

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/services/object/delete/util.go

@@ -30,7 +30,12 @@ func (w *headSvcWrapper) headAddress(ctx context.Context, exec *execCtx, addr oi
 	wr := getsvc.NewSimpleObjectWriter()
 
 	p := getsvc.HeadPrm{}
-	p.SetCommonParameters(exec.commonParameters())
+
+	if cp := exec.commonParameters(); cp != nil {
+		commonParameters := *cp
+		p.SetCommonParameters(&commonParameters)
+	}
+
 	p.SetHeaderWriter(wr)
 	p.WithRawFlag(true)
 	p.WithAddress(addr)