Use CMake modules rather than find package to deduce HIP configs

[NEELMCW]

resolves #___

Summary of proposed changes:

• Avoid need for hipConfig.cmake that would get generated currently only as part of ROCM installation
• Instead makes use of FindHIP.cmake module that gets shipped with HIP to set and deduce hip build and link configs
• TODO: The install script still looks for hip_hcc and rocBLAS on NV stack. This needs to be conditionallychecked based on target platform

[amcamd]

Please create your own branch. There is no agreement that this should be submitted to the develop branch.

[NEELMCW]

@amdcamd OK Will do the needful ... Thanks