fix: mistakenly changed sources to in-memory manifest

[antazoey]

What I did

fixes: #2271

To reproduce problem:

1. Have a contract, working good, with a test.
2. Run ape test, all is good
3. Make a change to the contract that causes a compiler error
4. Run ape test again, test acts like it did before, and there is no compiler error.

They key is that the change must be problematic and cause errors

How I did it

Frustratingly find spot where source Id is being overridden
Restore it.
Also, adjust error message

Test tbd

How to verify it

Checklist

• All changes are completed
• New test cases have been added
• Documentation has been updated

[antazoey]

• Also fix bug where when you uninstall a compiler and then make changes to a change - will be a second PR
• Get feedback from bug reporter - will come back to this
• Add better integration test