[hip-kernel-provider] Pass -std=c++17 to hiprtc compile options

[adickin-amd]

Title: [hip-kernel-provider] Pass -std=c++17 to hiprtc compile options

Summary

The fused BN+activation kernel (BatchNormFwdTrainSpatial.cpp) uses direct-list-init of a scoped enum (ActivationMode{HIP_PLUGIN_NRN_OP_ID}), a C++17-only construct (P0138R2). Without -std=c++17 in the hiprtc compile options, JIT compilation fails with HIPRTC_ERROR_COMPILATION and every IntegrationGpuBatchnormFwdTrainingActiv* test in RELU_FWD mode aborts. This PR adds the flag to the base options assembled in HipKernelCompileOptions.

Risk Assessment

Low risk. Single additive compile flag in the runtime hiprtc invocation path; no public API, build, or schema change. The codebase already requires C++17 elsewhere, and the only observable effect is that previously-rejected kernels now compile.

Testing Summary

• Reproduced the failure on a clean origin/develop worktree before applying the fix to confirm the bug is pre-existing.
• Re-ran the full hip-kernel-provider integration suite after the fix to verify the 432 previously-failing tests now pass with no regressions elsewhere.

Testing Checklist

• Baseline repro on origin/develop (no fix) - hip_kernel_provider_integration_tests.exe --gtest_filter="Smoke/IntegrationGpuBatchnormFwdTrainingActivNchwFp32.FullTraining/0" - ASICs: gfx1151 (Windows) - Status: Failed as expected (HIPRTC_ERROR_COMPILATION)
• Targeted re-run after fix - same gtest filter - ASICs: gfx1151 (Windows) - Status: Passed
• All *BatchnormFwdTrainingActiv* tests - hip_kernel_provider_integration_tests.exe --gtest_filter="*BatchnormFwdTrainingActiv*" - ASICs: gfx1151 (Windows) - Status: Passed (300/300)
• Full hip-kernel-provider-integration-check - cmake --build build --target hip-kernel-provider-integration-check - ASICs: gfx1151 (Windows) - Status: Passed (0 failures, ~436s)
• Commit hooks (clang-format, trailing whitespace, EOF) - git commit - Status: Passed
• PR CI - GitHub PR checks - Status: Pending

Technical Changes

• Adds -std=c++17 to the base hiprtc compile options in HipKernelCompileOptions, so JIT-compiled kernels that use if constexpr, scoped-enum brace-init, and other C++17 features compile cleanly instead of being silently rejected by the hiprtc default.