Enable fp8 support (#1101)

* initial checkin

* resolve cr comments

* resolve the build issue

* fix the data correctless issue

* update fp8 header file and update the unit test for fp8 support

* remove fp16 from fp8 headers

* fix ut issue and catch up the latest code from develop

* udate according to cr comments

* update ut according to cr comments

* update num floats for each SumPostDiv from 4 to 6

* update fp8 header file name

* fix the typo

[ROCm/rccl commit: 6777e65c1d]

projects/rccl/test/AllGatherTests.cpp

@@ -32,7 +32,7 @@ namespace RcclUnitTesting
 
     // Configuration
     std::vector<ncclFunc_t>     const funcTypes       = {ncclCollAllGather};
-    std::vector<ncclDataType_t> const dataTypes       = {ncclBfloat16, ncclFloat64};
+    std::vector<ncclDataType_t> const dataTypes       = {ncclBfloat16, ncclFloat64, ncclFp8E4M3, ncclFp8E5M2};
     std::vector<ncclRedOp_t>    const redOps          = {ncclSum};
     std::vector<int>            const roots           = {0};
     std::vector<int>            const numElements     = {586};