[CK TILE] remove dependency on std chrono

[CongMa13]

Proposed changes

I did some more digging and found that chrono is overkill for what we need. Including is notoriously slow because it is a heavyweight header. It doesn't just define a few functions; it brings in a massive web of templates, type traits, and extensive timezone and calendar support.

What we need is just a simple timer.

I replace it chrono with some C function. ( for windows and linux)

Tracking issue: #3575

Checklist

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• I have added tests relevant to the introduced functionality, and the unit tests are passing locally
• I have added the test to REGRESSION_TESTS list defined at the top of CMakeLists.txt in tests/CMakeLists.txt, IF the test takes more than 30 seconds to run.
• I have added inline documentation which enables the maintainers with understanding the motivation
• I have removed the stale documentation which is no longer relevant after this pull request
• (If this change is user-facing) I have added release notes which provide the end users with a brief summary of the improvement from this pull request
• I have run clang-format on all changed files
• Any dependent changes have been merged

Discussion

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[Copilot]

Pull request overview

This PR removes the dependency on <chrono> from the CK TILE library's timer implementation to improve compilation times. The heavyweight <chrono> header is replaced with lightweight platform-specific C functions for Windows (QueryPerformanceCounter) and Linux/Unix (clock_gettime).

Changes:

• Replaced std::chrono timer implementation with custom high-resolution clock functions
• Created new high_res_cpu_clock.hpp header with platform-specific timing implementations
• Updated cpu_timer struct to use the new timing functions

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
include/ck_tile/host/timer.hpp	Replaced chrono-based timer with custom high_res_now() functions and timepoint_t type
include/ck_tile/host/high_res_cpu_clock.hpp	Added new header implementing platform-specific high-resolution timing using C APIs
include/ck_tile/host.hpp	Added include for the new high_res_cpu_clock.hpp header

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[tenpercent]

since we're replacing some stdlib functionality with our custom one, should we also add tests for a sanity check?

[illsilin]

since we're replacing some stdlib functionality with our custom one, should we also add tests for a sanity check?

it's still using standard timing functions, just the ones defined in <time.h> or <windows.h> headers instead of <chrono.h> . those are pretty common and tested functions, so i'm sure we can trust them.

[illsilin]

not sure why the miopen fp32 convolution failed. just restarted TheRock CI build.