Enhance emulation tests

[tfcollins]

Add more parts and CI testing for emulation modes

[sourcery-ai]

Sourcery Code Quality Report

✅  Merging this PR will increase code quality in the affected files by 0.85%.

Quality metrics	Before	After	Change
Complexity	15.84 🙂	15.24 🙂	-0.60 👍
Method Length	59.11 ⭐	58.65 ⭐	-0.46 👍
Working memory	7.84 🙂	7.70 🙂	-0.14 👍
Quality	64.54% 🙂	65.39% 🙂	0.85% 👍

Other metrics	Before	After	Change
Lines	728	803	75

Changed files	Quality Before	Quality After	Quality Change
pytest_libiio/plugin.py	54.59% 🙂	54.41% 🙂	-0.18% 👎
tests/conftest.py	92.46% ⭐	92.07% ⭐	-0.39% 👎
tests/test_plugin.py	87.38% ⭐	87.49% ⭐	0.11% 👍

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
pytest_libiio/plugin.py	lookup_hw_from_map	68 ⛔	180 😞	15 😞	19.93% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
pytest_libiio/plugin.py	_contexts	21 😞	173 😞	11 😞	40.16% 😞	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
pytest_libiio/plugin.py	_iio_emu	31 😞	150 😞	9 🙂	40.63% 😞	Refactor to reduce nesting. Try splitting into smaller methods
pytest_libiio/plugin.py	handle_iio_emu	18 🙂	148 😞	12 😞	43.07% 😞	Try splitting into smaller methods. Extract out complex expressions
pytest_libiio/plugin.py	find_contexts	9 🙂	127 😞	11 😞	54.84% 🙂	Try splitting into smaller methods. Extract out complex expressions

Legend and Explanation

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• 😞 poor
• ⛔ very poor

The 👍 and 👎 indicate whether the quality has improved or gotten worse with this pull request.

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