[Comgr] Create a Global Logger Class for Comgr

[theSK2005]

Addresses this Jira Issue https://amd-hub.atlassian.net/browse/LCOMPILER-1886

• Creates a COMGR::Logger class with a global instance to allow all Comgr APIs to access the same set of logging utilities
• Creates separate log streams and APIs and allows logging granularity to be toggleable
• Replaces logging in comgr.cpp with new logging scheme
• Allows thread-safe access to log streams with mutexes/locks