poc(scanner): add a populated state test for ZECpages viewing key

[oxarbitrage]

Motivation

As part of the proof of concept we want to make sure we can scan for the ZECpages viewing key even if we get no responses scanning the test data.

Close #7903

Solution

Add a test for the mentioned use case.

Review

Reviewer Checklist

Check before approving the PR:

• Does the PR scope match the ticket?
• Are there enough tests to make sure it works? Do the tests cover the PR motivation?
• Are all the PR blockers dealt with?
  PR blockers can be dealt with in new tickets or PRs.

And check the PR Author checklist is complete.

Follow Up Work

[oxarbitrage]

@arya2 can you push a commit to the branch ?

[oxarbitrage]

So, we can merge this to issue7727 or merge #7758 and then rebase this to main.

[arya2]

So, we can merge this to issue7727 or merge #7758 and then rebase this to main.

Merging #7758 first and rebasing off main would give us smaller PRs, but these are tests. Either works.

[oxarbitrage]

Yea, i think @teor2345 will have to approve #7758 as we both worked on it, so ill let them decide.

[teor2345]

Thanks! I'm not sure how the merge order works here, let's see if I can just approve it and Mergify works it out.

The base branch was changed.

[teor2345]

Ok that merge looks better