Expand calibrations on client side (#1271)

* Expand calibrations on the client side

This introduces a few things:

  * QPUCompiler#_calibrations is a calibrations cache

  * QPUCompiler#get_calibrations (formerly
  QPUCompiler#get_quilt_calibrations) makes an API call to pull the
  latest calibrations from the translation service. It cares not for
  any cache.

  * QPUCompiler#refresh_calibrations grabs the latest calibrations and
  caches them

  * QPUCompiler#calibrations is a property that provides access to the
  cache if it exists, or populates the cache if it doesn't exist.

  * QPUCompiler#expand_calibrations takes a program, and returns a
  program where all calibrations are expanded. Calibrations defined in
  the input program take preference (hopefully) over those in the
  aforementioned cache.

* Store the calibrations Program rather than calibrations list

get_quilt_calibrations() returns more than just the calibrations - it
returns a bunch of frame defintions and waveform definitions. Bydoing

    self._calibrations = get_quilt_calibrations().calibrations

we are throwing away the frames/waveforms.

* fix style

* refactor calibrations -> calibration_program

and similar refactors

* update notebooks

* format

pyquil/api/_compiler.py

@@ -575,14 +575,22 @@ def calibration_program(self) -> Program:
 
 
     @_record_call
-    def get_quilt_calibrations(self) -> Program:
+    def get_calibration_program(self) -> Program:
         """
-        See ``QPUCompiler.get_quilt_calibrations()``.
+        See ``QPUCompiler.get_calibration_program()``.
 
-        Note: this currently provides an empty ``Program`` since the QVM does not support Quilt.
+        Note: this currently provides an empty Program because the QVM does not support Quilt.
         """
         return Program()
 
+    @_record_call
+    def refresh_calibration_program(self) -> None:
+        pass
+
+    @property
+    def calibration_program(self) -> Program:
+        return Program()
+
 
 @dataclass
 class HTTPCompilerClient: