Revert "Revert "Support fp8 types in hiprtc (#2605)" (#3792)"

[satyanveshd]

This reverts commit be0675a (#3792)

This change was earlier reverted due to issues seen in MIOpen via the rocm-systems bump PR ROCm/TheRock#3754.

Now, MIOpen has fixed the issues using https://github.com/ROCm/rocm-libraries/pull/5235/changes.
So reverting the revert to bring back the support for fp8 types in hiprtc.

Motivation

Users should be able to include fp8 header in hiprtc code.

Technical Details

Fix some include issues in fp8 header.

JIRA ID

ROCM-864

Test Plan

Added an fp8 test for hiprtc, basically include it from HIP directory and use it in rtc code.

Test Result

The test basically hiprtc output of fp8 conversion round trip float to what we get on CPU.

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[Copilot]

Pull request overview

This PR reintroduces HIPRTC support for FP8-related types/headers (reverting a prior revert) and adds/updates HIPRTC tests and bundled header content to ensure FP8 can be used from RTC-compiled code.

Changes:

• Add a new HIPRTC unit test exercising FP8 conversions.
• Update the existing HIPRTC FP16 header test kernel string to align with current half/half2 operator behavior.
• Extend the HIPRTC “builtins” header bundle to include FP8/BF16/OCP/MX headers and adjust related include guards.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
projects/hip-tests/catch/unit/rtc/hiprtc_fp8.cc	Adds a new unit test intended to validate FP8 usage in hiprtc-compiled kernels.
projects/hip-tests/catch/unit/rtc/hiprtc_fp16_HeaderTst.cc	Adjusts FP16 header test kernel string comparisons/expressions.
projects/clr/hipamd/src/hiprtc/CMakeLists.txt	Adds FP8/BF16/OCP/MX headers to the HIPRTC builtins header list.
projects/clr/hipamd/src/hiprtc/cmake/HIPRTC.cmake	Minor formatting cleanup in the macro file.
projects/clr/hipamd/include/hip/amd_detail/amd_hip_ocp_types.h	Adds HIPRTC-specific macro handling and uses HIP internal integer typedefs.
projects/clr/hipamd/include/hip/amd_detail/amd_hip_ocp_fp.hpp	Adjusts include strategy for HIPRTC/non-HIPRTC builds.
projects/clr/hipamd/include/hip/amd_detail/amd_hip_mx_common.h	Avoids including certain headers under HIPRTC builds.
projects/clr/hipamd/include/hip/amd_detail/amd_hip_fp8.h	Tweaks include guards/ordering for HIPRTC compatibility.

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