Merge branch 'fix-avs-huawei-save-config-error' into 'master'

Add Operation error to Huawei.MA5600T when message.

See merge request !2363

(cherry picked from commit 7621ee0f)

0458df81 Add Operation error to Huawei.MA5600T when "It will take several minutes to...
ec70ad9e Add clean_input method.
1c012f78 Fix flake.
aec55e75 Fix black.
7 jobs for !3825 with cherry-pick-7621ee0f in 13 minutes and 34 seconds (queued for 3 seconds)
merge request