Remove libglib-2.0.so.0 and libgobject-2.0.so.0 from Appimage (Avoid libsecret breakage)

[FredL69]

The latest version of linuxdeployqt bundles libglib-2.0.so.0 and libgobject-2.0.so.0 inside the Nextcloud Client AppImage.
This breaks libsecret support.
This PR remove libglib-2.0.so.0 and libgobject-2.0.so.0 from the AppImage generated by linuxdeployqt.
It is another way to workaround issue #103.

[x29a]

@FredericLespez thank you for providing the PR as a workaround as described in the linked issue over at linuxdeployqt and this would hopefully fix this prominent issue #4715.

i saw that the checks failed, if you click on details of the DCO, it claims that your commit message did not contain the required "signed-off" part and describes how you can add it. maybe this helps to bring this PR further?

[FredL69]

@x29a Sorry, i didn't see that a "signed-off" was required. It's OK now.

[x29a]

I verified your PR by running https://github.com/nextcloud/client-building/blob/master/linux/build-daily.sh on an Ubuntu 22.04.1 and the resulting appImage works great. It even logs into the accounts that were previously logged out.

As i cant contribute to your code changes i hope somebody with deeper insights and feedback will pick this up soon!

[FredL69]

I made another version of this PR.
Instead of downloading the AppImage of appimagetool, I use the appimagetool bundled with linuxdeployqt.

[zevlee]

I can confirm that this PR fixes the authorization issue with the Nextcloud Client AppImage.

@mgallien would you be able to look over the pull request?

[camilasan]

if that is the case, https://github.com/nextcloud/desktop/blob/master/admin/linux/build-appimage.sh also needs this change.