Add GitHub links to Qiskit v0.44 API docs (#653)

Part of #454. Note that
Qiskit 0.45 refers to Qiskit Terra 0.25.

docs/api/qiskit/0.44/algorithms.md

@@ -195,7 +195,7 @@ Algorithms that compute the fidelity of pairs of quantum states.
 
 <span id="qiskit.algorithms.AlgorithmError" />
 
-`qiskit.algorithms.AlgorithmError(*message)`
+`qiskit.algorithms.AlgorithmError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/algorithms/exceptions.py "view source code")
 
 For Algorithm specific errors.
 
@@ -215,7 +215,7 @@ Utility functions used by algorithms.
 
 <span id="qiskit.algorithms.eval_observables" />
 
-`qiskit.algorithms.eval_observables(quantum_instance, quantum_state, observables, expectation, threshold=1e-12)`
+`qiskit.algorithms.eval_observables(quantum_instance, quantum_state, observables, expectation, threshold=1e-12)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/algorithms/aux_ops_evaluator.py "view source code")
 
 Deprecated: Accepts a list or a dictionary of operators and calculates their expectation values - means and standard deviations. They are calculated with respect to a quantum state provided. A user can optionally provide a threshold value which filters mean values falling below the threshold.
 
@@ -247,7 +247,7 @@ ListOrDict\[[tuple](https://docs.python.org/3/library/stdtypes.html#tuple "(in P
 
 <span id="qiskit.algorithms.estimate_observables" />
 
-`qiskit.algorithms.estimate_observables(estimator, quantum_state, observables, parameter_values=None, threshold=1e-12)`
+`qiskit.algorithms.estimate_observables(estimator, quantum_state, observables, parameter_values=None, threshold=1e-12)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/algorithms/observables_evaluator.py "view source code")
 
 Accepts a sequence of operators and calculates their expectation values - means and metadata. They are calculated with respect to a quantum state provided. A user can optionally provide a threshold value which filters mean values falling below the threshold.
 

docs/api/qiskit/0.44/assembler.md

@@ -22,7 +22,7 @@ python_api_name: qiskit.assembler
 
 <span id="qiskit.assembler.assemble_circuits" />
 
-`qiskit.assembler.assemble_circuits(circuits, run_config, qobj_id, qobj_header)`
+`qiskit.assembler.assemble_circuits(circuits, run_config, qobj_id, qobj_header)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/assembler/assemble_circuits.py "view source code")
 
 Assembles a list of circuits into a qobj that can be run on the backend.
 
@@ -65,7 +65,7 @@ qobj = assemble_circuits(circuits=[qc],
 
 <span id="qiskit.assembler.assemble_schedules" />
 
-`qiskit.assembler.assemble_schedules(schedules, qobj_id, qobj_header, run_config)`
+`qiskit.assembler.assemble_schedules(schedules, qobj_id, qobj_header, run_config)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/assembler/assemble_schedules.py "view source code")
 
 Assembles a list of schedules into a qobj that can be run on the backend.
 
@@ -129,7 +129,7 @@ pulseQobj = assemble_schedules(schedules=[schedule],
 
 <span id="qiskit.assembler.disassemble" />
 
-`qiskit.assembler.disassemble(qobj)`
+`qiskit.assembler.disassemble(qobj)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/assembler/disassemble.py "view source code")
 
 Disassemble a qobj and return the circuits or pulse schedules, run\_config, and user header.
 

docs/api/qiskit/0.44/circuit.md

@@ -286,7 +286,7 @@ with qc.switch(cr) as case:
 
 <span id="qiskit.circuit.random.random_circuit" />
 
-`qiskit.circuit.random.random_circuit(num_qubits, depth, max_operands=4, measure=False, conditional=False, reset=False, seed=None)`
+`qiskit.circuit.random.random_circuit(num_qubits, depth, max_operands=4, measure=False, conditional=False, reset=False, seed=None)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/circuit/random/utils.py "view source code")
 
 Generate random circuit of arbitrary size and form.
 
@@ -329,7 +329,7 @@ Almost all circuit functions and methods will raise a [`CircuitError`](#qiskit.c
 
 <span id="qiskit.circuit.CircuitError" />
 
-`qiskit.circuit.CircuitError(*message)`
+`qiskit.circuit.CircuitError(*message)`[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/circuit/exceptions.py "view source code")
 
 Base class for errors raised while processing a circuit.