Fix nextcloud logo in email notifications misalignment

[medcloud]

Signed-off-by: medcloud 42641918+medcloud@users.noreply.github.com

Fixes the good positionning of theming logo in the circle when sending emails (like share by email or by link) : the logo was on the top of the circle, and circle sometimes on the left aligned in iOS Gmail for instance.

The modification proposed is mainly focused on a square logo which would be correctly centered. However, for a logo like Nextcloud one (252x120px) the display is a bit different but acceptable.

Fix #23357
Fix #23977

[skjnldsv]

Other than the other code syntax fix, 👍

[skjnldsv]

Last time, "continuous-integration/drone/pr had failed, would you know if there is something to do for that ?

Ah right, you need to fix the tests on tests/lib/Mail/EMailTemplateTest.php
https://drone.nextcloud.com/nextcloud/server/35550/10/4

[medcloud]

Last time, "continuous-integration/drone/pr had failed, would you know if there is something to do for that ?

Ah right, you need to fix the tests on tests/lib/Mail/EMailTemplateTest.php
https://drone.nextcloud.com/nextcloud/server/35550/10/4

The test have been fixed but the build is still failing. It seems unrelated.
There is now 1 failure in the mariadb10.4-php7.4 test that says:

1. Test\Share20\DefaultShareProviderTest::testGetSharedWithGroup with data set #0 ('home::shareOwner', 'files/test.txt', 'files/test2.txt')
   Failed asserting that '47' matches expected 0.

/drone/src/tests/lib/Share20/DefaultShareProviderTest.php:1030

Could somebody with more experience have a look (maybe @skjnldsv) ?

[skjnldsv]

1. Test\Share20\DefaultShareProviderTest::testGetSharedWithGroup with data set #0 ('home::shareOwner', 'files/test.txt', 'files/test2.txt')
   Failed asserting that '47' matches expected 0.

This seems unrelated. Ignore that

[welcome]

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22

[MorrisJobke]

/backport to stable20