change: Use `BraketSimulator.jl` in examples, strip out unnecessary `PyBraket.jl` components

[kshyatt-aws]

Issue #, if available: N/A

Description of changes: Now that BraketSimulator.jl exists, we can use that in examples where appropriate. This also means we only need PyBraket.jl for jobs results unpickling and interfacing with the "braket_ahs" local simulator, so we can remove a lot of extraneous logic from that subpackage.

Testing done: Unit tests passed locally.

Merge Checklist

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General

• [x] I have read the CONTRIBUTING doc
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• [x] I have updated any necessary documentation, including READMEs and API docs (if appropriate)

Tests

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• [x] I have added tests that prove my fix is effective or that my feature works (if appropriate)
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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 60.00000% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 89.05%. Comparing base (1d05da0) to head (5ec3f39).

Files	Patch %	Lines
PyBraket/src/local_simulator.jl	55.55%	12 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #84 +/- ## ========================================== - Coverage 90.38% 89.05% -1.33% ========================================== Files 39 36 -3 Lines 4356 3929 -427 ========================================== - Hits 3937 3499 -438 - Misses 419 430 +11 ```

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[kshyatt-aws]

Blocked on BraketSimulator.jl registration going through