SLES - Updates (#454)

* SLES - Updates

* Updates

* Cleanup

* Update CHANGELOG.md

Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com>

* CXX Compiler - Use AMD Clang++

* Docs - Updates

* ROCm Version - Upgraded to 6.3.0

* Readme - cleanup

* Readme - minor updates

* Readme - Fix note

---------

Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com>

[ROCm/rocdecode commit: 6339767b4c]

projects/rocdecode/test/CMakeLists.txt

@@ -20,7 +20,7 @@
 # SOFTWARE.
 #
 # ##############################################################################
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.10)
 
 project(rocdecode-test)