Update quantum runtime
Created by: tnguyen-ornl
Changes:
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Added QRT supports for 2-qubit gates.
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Supported kernel calls (define kernels and use them within another kernel body).
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Added a couple of examples, including a simple QPE.
Note: for the QPE example, I'm using a hard-coded controlled oracle atm. I'll look into porting the C-U circuit to the QRT later.