FIX: LSF submission string error 6182 (#6208)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>

Author: 3 people

doc/changelog.d/6208.fixed.md

@@ -0,0 +1 @@
+LSF submission string error 6182

src/ansys/aedt/core/desktop.py

@@ -37,6 +37,7 @@
 from pathlib import Path
 import pkgutil
 import re
+import shlex
 import shutil
 import socket
 import subprocess  # nosec
@@ -200,7 +201,7 @@ def launch_aedt_in_lsf(non_graphical, port):  # pragma: no cover
         if settings.aedt_log_file:
             command.extend(["-Logfile", settings.aedt_log_file])
     else:  # pragma: no cover
-        command = settings.custom_lsf_command.split(" ")
+        command = shlex.split(settings.custom_lsf_command)
         command.append("-grpcsrv")
         command.append(str(port))
     command_str = " ".join(str(x) for x in command)