Restrict numpy version to unblock inflight PRs from failing

[tanujkhattar]

Latest release of numpy breaks type checks on master.

See https://github.com/quantumlib/Cirq/runs/8161863398?check_suite_focus=true for failing tests.

Part of #5852

cirq-core/cirq/experiments/purity_estimation.py:61: error: Incompatible return value type (got "floating[Any]", expected "float")  [return-value]
cirq-core/cirq/sim/state_vector_simulator.py:87: error: Incompatible types in "yield from" (actual type "ndarray[Any, Any]", expected type "Sequence[complex]")  [misc]
cirq-core/cirq/sim/density_matrix_utils.py:257: error: Unsupported operand types for & ("object" and "int")  [operator]
cirq-core/cirq/sim/density_matrix_utils.py:257: error: Unsupported operand types for - ("object" and "int")  [operator]
cirq-core/cirq/sim/density_matrix_utils.py:267: error: No overload variant of "int" matches argument type "object"  [call-overload]
cirq-core/cirq/sim/density_matrix_utils.py:267: note: Possible overload variants:
cirq-core/cirq/sim/density_matrix_utils.py:267: note:     def __new__(cls, Union[str, bytes, array[Any], mmap, _CData, PickleBuffer, SupportsInt, SupportsIndex, SupportsTrunc] = ...) -> int
cirq-core/cirq/sim/density_matrix_utils.py:267: note:     def __new__(cls, Union[str, bytes], base: SupportsIndex) -> int
cirq-core/cirq/qis/states.py:687: error: Unused "type: ignore" comment
cirq-core/cirq/protocols/trace_distance_bound.py:109: error: Unused "type: ignore" comment
cirq-core/cirq/linalg/transformations.py:338: error: Unused "type: ignore" comment
cirq-core/cirq/linalg/decompositions.py:868: error: No overload variant of "vstack" matches argument type "ndarray[Any, Any]"  [call-overload]
cirq-core/cirq/linalg/decompositions.py:868: note: Possible overload variants:
cirq-core/cirq/linalg/decompositions.py:868: note:     def [_SCT <: generic] vstack(tup: Sequence[Union[_SupportsArray[dtype[_SCT]], _NestedSequence[_SupportsArray[dtype[_SCT]]]]]) -> ndarray[Any, dtype[_SCT]]
cirq-core/cirq/linalg/decompositions.py:868: note:     def vstack(tup: Sequence[Union[_SupportsArray[dtype[Any]], _NestedSequence[_SupportsArray[dtype[Any]]], bool, int, float, complex, str, bytes, _NestedSequence[Union[bool, int, float, complex, str, bytes]]]]) -> ndarray[Any, dtype[Any]]
cirq-core/cirq/interop/quirk/cells/input_rotation_cells.py:153: error: No overload variant of "__rpow__" of "float" matches argument type "Operation"  [operator]
cirq-core/cirq/interop/quirk/cells/input_rotation_cells.py:153: note: Possible overload variants:
cirq-core/cirq/interop/quirk/cells/input_rotation_cells.py:153: note:     def __rpow__(self, Literal[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25], None = ...) -> float
cirq-core/cirq/interop/quirk/cells/input_rotation_cells.py:153: note:     def __rpow__(self, Literal[-1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16, -17, -18, -19, -20], None = ...) -> complex
cirq-core/cirq/interop/quirk/cells/input_rotation_cells.py:153: note:     def __rpow__(self, float, None = ...) -> Any
cirq-core/cirq/experiments/fidelity_estimation.py:63: error: Incompatible return value type (got "floating[Any]", expected "float")  [return-value]
cirq-core/cirq/experiments/fidelity_estimation.py:196: error: Argument 1 has incompatible type "signedinteger[_64Bit]"; expected "int"  [arg-type]
cirq-core/cirq/experiments/fidelity_estimation.py:196: error: Argument 2 has incompatible type "ndarray[Any, Any]"; expected "Sequence[float]"  [arg-type]
cirq-core/cirq/contrib/quantum_volume/quantum_volume.py:153: error: Incompatible return value type (got "floating[_64Bit]", expected "float")  [return-value]
Found 14 errors in 10 files (checked 1059 source files)

This PR restricts the version of numpy to unblock the in-flight PRs.