fix(build): disable -race on arm64 due to Go 1.26.2 linker bug

[geyslan]

Go 1.26.2 breaks -race on arm64 (golang/go#78573)

Problem

Bumping the Go toolchain to 1.26.2 causes link failures on all arm64 test targets that use -race. The Go race detector embeds a pre-built TSAN runtime (gotsan.cpp compiled into race_linux_arm64.syso) that, starting with 1.26.2, references LSE outline-atomics symbols with _sync ordering:

__aarch64_ldadd8_sync
__aarch64_swp1_sync
__aarch64_cas4_sync
__aarch64_ldset8_sync
__aarch64_ldclr8_sync
... (many more)

These symbols are not resolved by the external linker (clang 19) used in our CI, even though GCC 11 is available on the runners. The Go linker invokes /usr/bin/clang as the external linker for CGO builds, and clang links against compiler-rt rather than libgcc. The compiler-rt version shipped with clang 19 does not provide the _sync variants of the outline-atomics helpers.

This affects the aarch64 kernel-test matrix (kernels 5.10, 5.15, and others) where make test-compatibility is called as the first step of the e2e test action.

Upstream

This is tracked upstream as golang/go#78573. The same breakage is confirmed by multiple reporters on Go 1.26.2 and 1.25.9 across Amazon Linux 2, Rocky Linux 9, and Bazel hermetic toolchains.

Workaround

Introduced GO_TEST_RACE variable in the Makefile, set to -race only when GO_ARCH != arm64. All six test targets (test-unit, test-types, test-common, test-integration, test-compatibility, test-performance) use $(GO_TEST_RACE) instead of a hardcoded -race flag.

Race detection can be forced on arm64 for testing with:

make test-compatibility GO_TEST_RACE=-race

Re-enable

Once golang/go#78573 is fixed (expected in Go 1.26.3 or a revised 1.26.2), remove the ifneq guard in the Makefile and restore unconditional -race.

Affected CI

• .github/workflows/pr.yaml -> kernel-tests job -> aarch64 matrix entries
• .github/actions/run-e2e-tests/action.yaml -> make test-compatibility

Error (abbreviated)

gotsan.cpp:(.text+0x12ec): undefined reference to `__aarch64_ldadd8_sync'
gotsan.cpp:(.text+0x1324): undefined reference to `__aarch64_swp1_sync'
gotsan.cpp:(.text+0x2c00): undefined reference to `__aarch64_ldadd4_sync'
...
clang: error: linker command failed with exit code 1 (use -v to see invocation)
FAIL    github.com/aquasecurity/tracee/tests/compatibility [build failed]