[mlir] Fix missing mlir-capi-global-constructors-test on standalone build (#154576)

Add `mlir-capi-global-constructors-test` to `MLIR_TEST_DEPENDS` when
`MLIR_ENABLE_EXECUTION_ENGINE` is enabled, to ensure that it is also
built during standalone builds, and therefore fix test failure due to
the executable being missing.

I don't understand the purpose of `LLVM_ENABLE_PIC AND TARGET
${LLVM_NATIVE_ARCH}` block, but the condition is not true in standalone
builds.

Fixes 7610b13.

Author: mgorny

mlir/test/CMakeLists.txt

@@ -157,7 +157,10 @@ if(MLIR_ENABLE_CUDA_RUNNER)
 endif()
 
 if(MLIR_ENABLE_EXECUTION_ENGINE)
-  list(APPEND MLIR_TEST_DEPENDS mlir-capi-execution-engine-test)
+  list(APPEND MLIR_TEST_DEPENDS
+    mlir-capi-execution-engine-test
+    mlir-capi-global-constructors-test
+  )
 endif()
 
 if(MLIR_ENABLE_ROCM_RUNNER)