feat(ci): separate CI and release ASAN build configs for debug info control

[nunnikri]

Summary

Separate ASAN build configurations into CI (no debug info) and
release/nightly (with debug info) variants to reduce binary size for
CI builds while preserving debuggable symbols for nightly releases.

ISSUE ID : 6631

Motivation

ASAN instrumentation already bloats binary size 3-5x due to shadow memory
checks. Combined with debug symbols, an ASAN-instrumented rocBLAS library
was ~350MB, dropping to ~50MB after stripping. For CI builds (pull_request,
workflow_dispatch from rocm-systems/rocm-libraries), debug info is
unnecessary — the goal is simply catching bugs. For rockrel nightly/release
builds, -g1 is needed so that ASAN stack traces include source line
numbers for user investigation.

Technical Details

cmake/therock_sanitizers.cmake
Removed -g from the sanitizer CMAKE_CXX/C_FLAGS_INIT stanza for both
HOST_ASAN and ASAN. Debug info is now controlled exclusively by the
CMake preset, eliminating the redundant (and previously overridden) flag.

CMakePresets.json

• linux-release-asan / linux-release-host-asan (modified):
  CMAKE_BUILD_TYPE changed from RelWithDebInfo to Release. Debug
  flags (-g1 -gdwarf-4) removed. Used for CI ASAN builds — smaller
  binaries, faster builds.
• linux-release-asan-debug / linux-release-host-asan-debug (new):
  RelWithDebInfo + -g1 -gdwarf-4. Used for rockrel nightly/release
  builds where stack traces need source line info.

build_tools/github_actions/amdgpu_family_matrix.py
Added asan-debug and host-asan-debug build variants pointing to the
new debug presets.

.github/workflows/multi_arch_release_asan.yml
Changed build_variant: "asan" → build_variant: "asan-debug" so that
rockrel nightly/release builds use RelWithDebInfo with -g1.

Impact on normal builds: Zero. All changes are scoped to ASAN presets
and the THEROCK_SANITIZER code path which is never active in normal
Release or RelWithDebInfo builds.

Build path	Preset	CMAKE_BUILD_TYPE	Debug flags
CI ASAN (rocm-systems/libraries PR)	linux-release-asan	Release	none
CI host-ASAN (PR)	linux-release-host-asan	Release	none
Nightly/release ASAN (rockrel)	linux-release-asan-debug	RelWithDebInfo	-g1 -gdwarf-4
Nightly/release host-ASAN	linux-release-host-asan-debug	RelWithDebInfo	-g1 -gdwarf-4

Test Plan

• Trigger ASAN CI from rocm-systems: verify build uses Release + no debug flags
• Trigger rockrel nightly ASAN: verify build uses RelWithDebInfo + -g1 -gdwarf-4
• Trigger normal release CI: verify no change in build flags

Test Results

Test asan run(No debug) : https://github.com/ROCm/TheRock/actions/runs/32318830419
Reference asan run(with -g1) : https://github.com/ROCm/TheRock/actions/runs/32316786022

Metric	ASAN (no debug)	ASAN (with -g1 debug)
Build time	5.5 hours	6.5 hours
Archive size (compressed)	<4 GB	20 GB
Full size (decompressed)	15 GB	141 GB
Archive size increase	baseline	5× larger
Decompressed size increase	baseline	9.4× larger

[therock-pr-bot]

✅ All Checks Passed — Ready for Review

Check	Status	Details
📝 PR Description	✅ Pass	—
⛔ Forbidden Files	✅ Pass	—
🧪 Unit Test	⚠️ Warning	Error: Source/code files changed without an accompanying unit test. Expected: add at least one test file named like test_<name>.py / test_<name>.cpp (or <name>_test.*). Current: code file(s) changed: build_tools/github_actions/amdgpu_family_matrix.py; no test file found
🔎 pre-commit	✅ Pass	—
🚫 Draft PR	🔜 To Be Enabled	—
🚩 Feature Flag	🔜 To Be Enabled	—
📊 Code Coverage	🔜 To Be Enabled	—
🤖 therock-pr-bot	✅ Pass	—

🎉 All checks passed! This PR is ready for review.

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[therock-pr-bot]

🎉 All checks passed! This PR is ready for review.

[nunnikri]

The ci build is showing even better build time. https://github.com/ROCm/TheRock/actions/runs/32383947983/job/96535471079?pr=7511
Build time 1 arch(gfx94X) - 3:35h
Archive size (compressed) : 3.75GB
Archive size (uncompressed) : 15GB

@sa-faizal