Add TortoiseORMInstrumentor tests

[tammy-baylis-swi]

What problem do you want to solve?

Add TortoiseORMInstrumentor tests, because at the moment it's:

    def test_tortoise(self):
        # FIXME This instrumentation has no tests at all and should have some
        # tests. This is being added just to make pytest not fail because no
        # tests are being collected for tortoise at the moment.
        pass

Describe the solution you'd like

Some unit tests, functional tests to assert telemetry and attributes generation.

Describe alternatives you've considered

No response

Additional Context

No response

Would you like to implement a fix?

None

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