Support controlled gates in PyQVM

[notmgsk]

Really this hands off matrix calculation to
pyquil.simulation.tools.lifted_gate() which has better support for
the various gate modifiers.

Description

Insert your PR description here. Thanks for contributing to pyQuil! 🙂

Checklist

• The above description motivates these changes.
• There is a unit test that covers these changes.
• All new and existing tests pass locally and on Travis CI.
• Parameters and return values have type hints with PEP 484 syntax.
• Functions and classes have useful Sphinx-style docstrings.
• All code follows Black style and obeys flake8 conventions.
• (New Feature) The docs have been updated accordingly.
• (Bugfix) The associated issue is referenced above using auto-close keywords.
• The changelog is updated, including author and PR number (@username, gh-xxx).