Rewrite leak tests without dotMemory #20004
Description
Is your feature request related to a problem? Please describe.
dotMemory Unit does not support modern .NET versions.
Leak tests have been disabled in the .NET 10 PR.
Describe the solution you'd like
Consider rewriting the tests without using dotMemory. It should be doable by using only weak references.
Describe alternatives you've considered
No response
Additional context
No response