Move tests to version 3.8 + fix tempdir handling in older python

[MarcelGeo]

• fix temp file params , which are not available in python under 3.10
• downgade python for tests to 3.8 as discussed with @wonder-sk for support legacy QGIS 3.22

[MarcelGeo]

We can discuss if run tests against 3.7 or 3.8 version.

[JanCaha]

Functionally it looks ok.

But I do not quite like that we do these changes to support that old version of the Python. Seems like we create technical debt on purpose

[JanCaha]

the pass here and also below is not necessary, there is another statement in the except block

[tomasMizera]

Given that we support QGIS versions 3.22+ we can not use concepts from Python versions 3.9+

[MarcelGeo]

😶‍🌫️ true

[wonder-sk]

There are few more places where the explicit cleanup of temporary dir should be added:

• in download_project_cancel()
• in download_project_finalize() when raising exceptions
• in similar calls for pull and push

[MarcelGeo]

There are few more places where the explicit cleanup of temporary dir should be added:

* in download_project_cancel()

* in download_project_finalize() when raising exceptions

* in similar calls for pull and push

Try to look at this in commit @wonder-sk , thanks