Update license to NOTICE file

Bundled third party license content is now described under NOTICE file.

confluent_vtbufferd/NOTICE

@@ -0,0 +1,24 @@
+Copyright and licensisng of vtbufferd
+
+# Copyright:: Copyright (c) 2022 Lenovo
+# License:: Apache License, Version 2.0
+
+
+Additionally, some files included in this package have specified their own
+licenses that are differed from the vtbufferd license itself, specifically:
+
+File: tmt.c
+
+Copyright (c) 2017 Rob King
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+  * Neither the name of the copyright holder nor the
+    names of contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.

confluent_vtbufferd/confluent_vtbufferd.spec.tmpl

@@ -27,10 +27,10 @@ make
 %install
 mkdir -p $RPM_BUILD_ROOT/opt/confluent/bin $RPM_BUILD_ROOT/opt/confluent/share/licenses/vtbufferd
 cp vtbufferd $RPM_BUILD_ROOT/opt/confluent/bin/
-cp COPYING.tmt $RPM_BUILD_ROOT/opt/confluent/share/licenses/vtbufferd
+cp NOTICE $RPM_BUILD_ROOT/opt/confluent/share/licenses/vtbufferd
 cp LICENSE $RPM_BUILD_ROOT/opt/confluent/share/licenses/vtbufferd
 
 %files
 /opt/confluent/bin/vtbufferd
-%license /opt/confluent/share/licenses/vtbufferd/COPYING.tmt
+%license /opt/confluent/share/licenses/vtbufferd/NOTICE
 %license /opt/confluent/share/licenses/vtbufferd/LICENSE