Git: Adapt grep to new default coloring in Git 2.35

Change-Id: Id830d3341974f70e4ce6b419152d3558bba2a95f
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/git/gitgrep.cpp

@@ -161,6 +161,8 @@ public:
         QStringList arguments = {
             "-c", "color.grep.match=bold red",
             "-c", "color.grep=always",
+            "-c", "color.grep.filename=",
+            "-c", "color.grep.lineNumber=",
             "grep", "-zn", "--no-full-name"
         };
         if (!(m_parameters.flags & FindCaseSensitively))