[REM-2982] Update Flatpak to use GNOME runtime version 44

Description

Update from runtime version 43 to 44. Also update phodav to version 3 to remove dependency on outdated libsoup version.

Related Issue

#2982 (closed)

Motivation and Context

GNOME runtime version 43 reached its end of life.

How Has This Been Tested?

New Flatpak built. Tested several plugins including RDP, SSH and web.

mentioned in commit 3ead2d9d

merged

mentioned in issue #3000 (closed)

mentioned in merge request !2564 (merged)