Fix flaky static queries tests

[papafe]

We should fix flaky static queries tests, for example in:

• https://github.com/realm/realm-dotnet/runs/22894980207#r0s1
• https://github.com/realm/realm-dotnet/runs/22612387507

It seems most of the time it's the tests RealmObjectAPI_RealmValueLinks_AtlasToRealm and RealmObjectAPI_Links_AtlasToRealm that are giving issues. I think this could be due to some timing issues, for example if objects are created but the properties are not set yet, or if clearing the collection at the beginning is not yet propagated to realm before continuing.

[sync-by-unito]

➤ PM Bot commented:

Jira ticket: RNET-1126

[papafe]

I think that here we have two possibilities:

• Retry the tests with the Retry attribute
• We make much larger use of the WaitForEvent, WaitForCondition methods, almost substituting the assertion with the timeouts of those methods