[Darwin][Test][leaks] Disable leak detection for asan tests on non-Intel Darwin devices (#131676)

`detect_leaks` option for asan does not work well on Apple Silicon
(arm64) MacOS devices and results in hundreds of ASan test failures when
run with this option set for all tests.

We should not add this option for tests unless we are targeting an
x86_64 device for Darwin, where this seems to be tested and working
well.

rdar://147069153

Author: thetruestblue

compiler-rt/test/asan/lit.cfg.py

@@ -25,8 +25,13 @@ def get_required_attr(config, attr_name):
 default_asan_opts = list(config.default_sanitizer_opts)
 
 # On Darwin, leak checking is not enabled by default. Enable on macOS
-# tests to prevent regressions
-if config.host_os == "Darwin" and config.apple_platform == "osx":
+# tests to prevent regressions.
+# Currently, detect_leaks for asan tests only work on Intel MacOS.
+if (
+    config.host_os == "Darwin"
+    and config.apple_platform == "osx"
+    and config.target_arch == "x86_64"
+):
     default_asan_opts += ["detect_leaks=1"]
 
 default_asan_opts_str = ":".join(default_asan_opts)
@@ -273,7 +278,11 @@ def build_invocation(compile_flags, with_lto=False):
     and (not config.android)
     and (config.target_arch in ["x86_64", "i386", "riscv64", "loongarch64"])
 )
-leak_detection_mac = (config.host_os == "Darwin") and (config.apple_platform == "osx")
+leak_detection_mac = (
+    (config.host_os == "Darwin")
+    and (config.apple_platform == "osx")
+    and (config.target_arch == "x86_64")
+)
 leak_detection_netbsd = (config.host_os == "NetBSD") and (
     config.target_arch in ["x86_64", "i386"]
 )