Avoid Ctx API in HIP backend

[gsitaram]

Tested some unit tests and perf_test and they seem to run fine without these API calls on AMD GPUs. Context APIs are now deprecated in newer versions of ROCm, and functionality is satisfied by hipSetDevice() API call. Please review and merge.
cc: @alazzaro

[alazzaro]

@gsitaram thanks for this PR, however I would like to ask you 2 changes:

• we need this change only for recent HIP versions (according to Consider to drop -Werror for tests/configs pulling external APIs/frameworks #783 (comment) this is starting with version 6.0)
• we can revert the change I did at Fix CI #792, namely we can remove those lines

dbcsr/cmake/CompilerConfiguration.cmake

Lines 54 to 56 in 3d55499

	if (USE_ACCEL MATCHES "hip" AND hip_VERSION GREATER_EQUAL 6.0.0) # Remove deprecated function error with ROCm v6+
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=deprecated-declarations")
	endif ()

[gsitaram]

@alazzaro, why do we need these ctx APIs for any version of ROCm? I would like to avoid those APIs completely. In that case, only unwinding your fixes in #792** would be sufficient, and I have done that now.

[alazzaro]

@alazzaro, why do we need these ctx APIs for any version of ROCm? I would like to avoid those APIs completely. In that case, only unwinding your fixes in #792** would be sufficient, and I have done that now.

Personally, I have no idea what those functions do. There were there for the AMD backend since ages, so my assumption was that we need them for the Rocm 5.x... Now, if you tell me that we can drop them for all ROCM versions, then I'm fine with that ;)

[gsitaram]

Thank you, @alazzaro . I think we should be fine. Let me know if you encounter issues that may be related to this.