SI-8893 Test tailcall transform for mix of tail/non-tail recursion

Another excellent test suggestion by Dear Reviewer.

After tail calls, the transform results in:

```
def tick(i: Int): Unit = {
      <synthetic> val _$this: Test.type = Test.this;
      _tick(_$this: Test.type, i: Int){
        if (i.==(0))
  ()
else
  if (i.==(42))
    {
      Test.this.tick(0);
      _tick(Test.this, i.-(1).asInstanceOf[Int]())
    }
  else
    _tick(Test.this, i.-(1).asInstanceOf[Int]()).asInstanceOf[Unit]()
      }
    };
```

We test this by mostly exercising the tail-recursive code path with
a level of recursion that would overflow the stack if we weren't
using jumps.

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