[lldb/crashlog] Remove aarch64 requirement on crashlog tests (#94553)

This PR removes the `target-aarch64` requirement on the crashlog tests
to exercice them on Intel bots and make image loading single-threaded
temporarily while implementing a fix for a deadlock issue when loading
the images in parallel.

Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>

lldb/examples/python/crashlog.py

@@ -1814,6 +1814,9 @@ def SymbolicateCrashLogs(debugger, command_args, result, is_command):
             )
         )
 
+    if "NO_PARALLEL_IMG_LOADING" in os.environ:
+        options.no_parallel_image_loading = True
+
     if options.version:
         print(debugger.GetVersionString())
         return