* Added single process isolation support to execute tests
* Address review comments
* Update README
* Removed requirement of explicit call to clear method
* Added macros for simplified usage
* Updated tests to use process isolation framework
* Adjust summary output format for isolated tests
* Updated rccl_wrap tests
* Used process isolation in AllocTests
* Used process isolation and fixed failing tests
* Modified test output, added signal handling
Updated macros to handle lambdas
* Convert argcheck tests to isolated tests
* Convert proxy tests to isolated tests
* Remove non-supported test
* Fixed file descriptor handling and clearing env vars for tests
[ROCm/rccl commit: 7e10267dfd]
Atul Kulkarni