Fixes #2257 : Temporary Directory Cleanup for Materializers

[akesterson]

Describe changes

I fixed the integrated materializers methods for creating temporary files and directories (#2257) to achieve a unified approach to temporary file and directory management that doesn't require manual cleanup methods. The tempfile module has context managers which manage cleanup for us.

I didn't add anything to the tests because I'm not certain where we should enforce the usage of tempfile:

1. In the contribution process, in which case we should update the docs
2. In the peer review process, in which case we should update the maintainer docs
3. In the testing process, in which case we should update the integration tests for the materializers

I think 1 and 2 are the best places to enforce this pattern. We don't need to test whether or not the tempfile context managers are working, we know they do, they have upstream tests. Any software tests of this pattern would really need to ask the question "are your integration materializers using tempfile context managers to manage your temporary files?", which is going to be difficult to do in code.

If the maintainers want me to take a crack at improving the tests to answer this question for the materializers, I will, but I am not sure that's the best way to accomplish compliance.

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Types of changes

• Bug fix (non-breaking change which fixes an issue)
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[CLAassistant]

All committers have signed the CLA.

[strickvl]

I agree that #1 and #2 are the ways to 'enforce' this, plus our internal review process and standards etc. Feel free to make the relevant docs update as you suggested.

[akesterson]

Docs are updated. Fixed a couple of materializers I had missed.

[strickvl]

Some tests failing in the CI and you'll have to run the formatting script as well. (bash scripts/format.sh)

[akesterson]

Ran the formatter, fixed the errors I had in the CI CD check script output. There is one failing unit test in the numpy materializer that is on the develop branch as well. Otherwise seems clean.

[avishniakov]

Ah, this was a tricky bug to catch :) With the current implementation a matrix is lazy loaded later on and if you dump it to a temp file with clean-up, it will fail later on. So clean-up here is not feasible without heavy rework.