Add e2e test adding metadata to skeleton tracing

[frcroth]

Added an e2e test that contains an update action that updates metadata. Some notes:

• This could also be included into the "Send complex update actions and compare resulting tracing" test if we want to keep duplication / number of tests lower
• This does not include tests for adding metadata to volume annotations. It seems there arent any tests for updating volume tracings?

Issues:

• fixes e2e tests for segment + tree metadata #8089

[fm3]

Looking good, thanks!

Could you have a look at how long this new test is running? If it is slow, maybe it can be combined with another test that already creates trees? That way I would hope the CI time does not increase.

I am not super familiar with the existing tests. If there is really no test for updating volume tracings, maybe that would be a good new issue as well. Though if one of the update routes is tested, that already covers a lot of the code used by both skeleton and volume, so that wouldn’t have super high priority

[frcroth]

This new test does not seem to really affect CI time. For me locally, it takes about 0.2 s.
It can definitely be combined with an existing test, if that is desired.

[fm3]

ok for 0.2s I’d say we can leave it as is for now :)