[mlir] Don't use -z,defs on sanitizer builds

This works around link errors when building the python bindings with
ASAN, since the ASAN run-time doesn't get linked into shared libraries.
The ASAN docs specficially call out -z,defs as a potential issue:
https://clang.llvm.org/docs/AddressSanitizer.html#usage

closes https://github.com/llvm/llvm-project/issues/60565

Reviewed By: stellaraccident, mehdi_amini

Differential Revision: https://reviews.llvm.org/D145956

mlir/cmake/modules/AddMLIR.cmake

@@ -495,7 +495,9 @@ function(add_mlir_aggregate name)
   # many other platforms are more strict. We want these libraries to be
   # self contained, and we want any undefined symbols to be reported at
   # library construction time, not at library use, so make Linux strict too.
-  if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  # We make an exception for sanitizer builds, since the AddressSanitizer
+  # run-time doesn't get linked into shared libraries.
+  if((CMAKE_SYSTEM_NAME STREQUAL "Linux") AND (NOT LLVM_USE_SANITIZER))
     target_link_options(${name} PRIVATE
       "LINKER:-z,defs"
     )