fix(utils): MaybeMockedConstructor returns T

[KostyaTretyak]

Summary

At this point, MaybeMockedConstructor can return an empty object, causing the source type to be lost. This PR fixes this.

For example, the mocked(MyClass.prototype) function actually returns a new type that has the same properties as MyClass.prototype, but does not link to MyClass.prototype.

Because of this, you cannot click on a specific property and go to the source class. For the same reason, during refactoring, renaming properties in the source class does not rename the corresponding properties in the tests.

Does this PR introduce a breaking change?

• Yes
• No

[coveralls]

Pull Request Test Coverage Report for Build 5961

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.214%

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Totals
Change from base Build 5960:	0.0%
Covered Lines:	1137
Relevant Lines:	1171

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💛 - Coveralls

[ahnpnl]

thanks ! LGTM