Migrate to New NumPy Random Number Generator (RNG) API

[seanlaw]

See NumPy Reference

Currently, STUMPY still uses the legacy way of drawing random numbers. We should migrate to the new Generator.

This should include updating:

1. All code
2. All unit tests
3. All docstrings
4. All examples
5. All tutorials
6. All README

This issue is the precursor for #707

Things to change:

RNG = np.random.default_rng()

@pytest.fixture(scope="module")
def rng_state():
    yield RNG.bit_generator.state

[seanlaw]

It will be challenging to recreate/match the tests with a preset random seed (namely, in tests/test_precision.py)

[seanlaw]

@NimaSarajpoor Would you happen to know the reason why the random seed is set to 0 in the tests/test_core.py file?

https://github.com/stumpy-dev/stumpy/blame/2d8854a00afca572b00758f4abfcc26739396e43/tests/test_core.py#L1894-L1895

Initially, I thought that it may be because we needed to reset the state but it doesn't appear that way.

[NimaSarajpoor]

@seanlaw
That is strange. I took a look at the test function, and I think it should work regardless of the random seed.