Remove hip-hcc codes: Part four

Remove __HCC__, __HCC_ONLY__, __HCC_CPP__, __HCC_C__,
__HCC_OR_HIP_CLANG__, __HIP_ROCclr__ and their guarded codes.

Remove Hcc codes from directed_tests and samples.

Remove __HIP_PLATFORM_HCC__ and __HIP_PLATFORM_NVCC__ from
some files where they are not necessary.

Add deprecation notice.

Change-Id: I1ae467eafd749d6c25bca204c1724b026be21fce


[ROCm/clr commit: d504a761ad]

projects/clr/hipamd/tests/src/deviceLib/hipMathFunctions.cpp

@@ -21,7 +21,7 @@ THE SOFTWARE.
 */
 
 /* HIT_START
- * BUILD: %t %s ../test_common.cpp HCC_OPTIONS -Xclang -fallow-half-arguments-and-returns CLANG_OPTIONS -Xclang -fallow-half-arguments-and-returns EXCLUDE_HIP_PLATFORM nvidia
+ * BUILD: %t %s ../test_common.cpp CLANG_OPTIONS -Xclang -fallow-half-arguments-and-returns EXCLUDE_HIP_PLATFORM nvidia
  * TEST: %t
  * HIT_END
  */