fix(compiler): check if test file exists before doing type check #1827
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Summary
Addressed in #1506 (comment)
The problem is that the test file can be renamed which then makes the link between the imported module with the old test name no longer valid. Therefore we need to check whether the test file still exists before doing type check.
Test plan
Added unit test
Does this PR introduce a breaking change?
Other information
Will release alpha first and then hot fix release later