refactor(analytics): remove unused property adaptlyApproved from PullRequest model

[supalarry]

Problem

Originally, it was added because Adaptly was approving the PR. We also did not take into the consideration that Adaptly can run into a case when it does not "approve" the PR - if it checks the target version and the user does not run Adaptly again.

Solution

Drop adaptlyApproved property from PullRequest model. Instead, for analytics check entries in DependencyUpdate where cursorVersion = targertVersion. That means that Adaptly has done it's job.