Include e-mail shares when transferring ownership

[rawtaz]

E-mail shares weren't included in the processing of shares when using the occ files:transfer-ownership command, so they'd be lost (not visible in either the former or the new account). This commit fixes that.

[rawtaz]

This was a quick edit when encountering this bug during first trying out Nextcloud. Is there something missing or should I mark it non-draft? It would be great if someone else could test it as well!

[rawtaz]

Regarding checks:

• There are tests failing that cannot possibly be due to this change I made.
• What the DCO regulates is already covered by GitHub's terms when I file this PR.

Hopefully this can be merged. Otherwise someone with more knowledge of the Nextcloud codebase can perhaps fix the problem in a commit/PR of their own.

[rawtaz]

Question: Are there other share types that are missing too and that should be added in the same code? Better do it now if that is the case.

[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

[rawtaz]

Sorry to ask this here, but I haven't been able to find an answer on the other channels I've tried:

• What practical use does accepting an invite to the @nextcloud organization here on GitHub have? What can you do with it? What are the intentions when inviting people to it? I'm not sure if it's a social "belong to the group" thing, or if it has a more practical function.

• Is such an invite something that is sent out automatically to contributors when their PRs are merged, or is it something that's done manually and on an individual basis (as opposed to everyone getting a PR merged)? I received one and am not sure why, because the PR I filed was really tiny :P

Thanks!

[nickvergessen]

Being in the group means you can push your branches to our repo instead of having to maintain a fork in your user. Also it allows to request reviews in case follow up work is needed.

Inviting is done manually.