python3-trio: Fixes Bug#13076 - allows fuse mount to work again

- In Core 173 python3-trio was updated to version 0.22.0 when python was upgraded to 3.10.8
   Although the build of python3-trio was successful it was missed that there was a new
   run-time dependency of python3-exceptiongroup for python3-pyfuse3 to work.
   python2-flit_scm is required as a build dependency for python3-exceptiongroup.
- The modified packages were installed in my vm testbed and confirmed that borg mount then
   worked again.
- It was also noted that python3-attr was no longer needed neither as a runtime
   dependency nor as a build time dependency.
- Dependencies line of python3-trio updated for these two changes.

Fixes: Bug#13076
Tested-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>

lfs/python3-trio

@@ -1,7 +1,7 @@
 ###############################################################################
 #                                                                             #
 # IPFire.org - A linux based firewall                                         #
-# Copyright (C) 2007-2020  IPFire Team  <info@ipfire.org>                     #
+# Copyright (C) 2007-2023  IPFire Team  <info@ipfire.org>                     #
 #                                                                             #
 # This program is free software: you can redistribute it and/or modify        #
 # it under the terms of the GNU General Public License as published by        #
@@ -33,9 +33,9 @@ DL_FROM    = $(URL_IPFIRE)
 DIR_APP    = $(DIR_SRC)/$(THISAPP)
 TARGET     = $(DIR_INFO)/$(THISAPP)
 PROG       = python3-trio
-PAK_VER    = 2
+PAK_VER    = 3
 
-DEPS       = python3-attr python3-async_generator python3-attrs python3-sniffio python3-sortedcontainers python3-outcome python3-idna
+DEPS       = python3-async_generator python3-attrs python3-sniffio python3-sortedcontainers python3-outcome python3-idna python3-exceptiongroup
 
 SERVICES   =