[Interp] Mark the test unsupported with Asan (#102859)

It's very flaky recently.

10 bulds are OK, then 3 failed:
https://lab.llvm.org/buildbot/#/builders/52/builds/1524
https://lab.llvm.org/buildbot/#/builders/52/builds/1525
https://lab.llvm.org/buildbot/#/builders/52/builds/1526
then 3 OK
https://lab.llvm.org/buildbot/#/builders/52/builds/1531
https://lab.llvm.org/buildbot/#/builders/52/builds/1532
then 2 green again

We need to stop to spam blame list by disabling the test,
and investigate later if Asan is valuable for the test.

Issue #102858

Author: vitalybuka

clang/test/Interpreter/const.cpp

@@ -2,6 +2,9 @@
 // see https://github.com/llvm/llvm-project/issues/68092
 // XFAIL: host={{.*}}-windows-msvc
 
+// The test is flaky with asan https://github.com/llvm/llvm-project/issues/102858.
+// UNSUPPORTED: asan
+
 // RUN: cat %s | clang-repl | FileCheck %s
 // RUN: cat %s | clang-repl -Xcc -O2 | FileCheck %s