Fix PySide import error for perf script: export-to-postgresql.py

PySide and PySide2 are not supported for Python3.7 and above
Based on Python version, different PySide versions can be imported
PySide6 should be imported in case of Python3.7 and above

Signed-off-by: Misbah Anjum N <misanjum@linux.vnet.ibm.com>

Author: misanjumn

tools/perf/scripts/python/export-to-postgresql.py

@@ -223,16 +223,15 @@
 #                   print "{0:>6}  {1:>10}  {2:>9}  {3:<30}  {4:>6}  {5:<30}".format(query.value(0), query.value(1), query.value(2), query.value(3), query.value(4), query.value(5))
 #                   call_path_id = query.value(6)
 
-PYSIDE_VERSION_1 = True
-if "pyside-version-1" not in sys.argv:
-    try:
-        from PySide2.QtSql import *
-        PYSIDE_VERSION_1 = False
-    except:
-        pass
-
-if PYSIDE_VERSION_1:
+# Import PySide based on Python Version
+if "pyside-version-1" in sys.argv or "--pyside-version-1" in sys.argv \
+or sys.version_info < (2,7):
     from PySide.QtSql import *
+else:
+    if sys.version_info >= (3,7):
+        from PySide6.QtSql import *
+    else:
+        from PySide2.QtSql import *
 
 if sys.version_info < (3, 0):
     def toserverstr(str):