Remove Python 3.8 from build pipelines and tox.ini, add Python 3.13 and various other fixes and dependency upgrades

[Kami]

Description

Python 3.8 has been EOL for a while.

This PR removes Python 3.8 from build pipeline (GHA workflows) and tox.ini.

It also updates various tox targets which used 3.8 to now use 3.9 instead.

Other Changes

• Add Python 3.13 to the build pipeline
• Upgrade version of cryptography used for tests to avoid pip audit failing
• Update testing Docker image (remove 3.7 and 3.8, use 3.9 as base for tox, add 3.12, 3.13 and PyPy 3.10)
• Fix bandit false positives
• Fix integration test failure due to changes in the output in upstream MinIO Docker testing image we use
• Upgrade various dev / testing / docs dependencies

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 52.70270% with 35 lines in your changes missing coverage. Please review.

Project coverage is 83.40%. Comparing base (41ba049) to head (cb85b28).
Report is 81 commits behind head on trunk.

Files with missing lines	Patch %	Lines
libcloud/compute/drivers/vsphere.py	9.09%	10 Missing ⚠️
libcloud/compute/drivers/vcloud.py	60.00%	2 Missing and 2 partials ⚠️
libcloud/dns/drivers/vultr.py	0.00%	4 Missing ⚠️
libcloud/compute/drivers/kubevirt.py	50.00%	3 Missing ⚠️
libcloud/compute/drivers/equinixmetal.py	50.00%	2 Missing ⚠️
libcloud/compute/drivers/nttcis.py	33.33%	2 Missing ⚠️
libcloud/dns/drivers/worldwidedns.py	0.00%	2 Missing ⚠️
libcloud/common/worldwidedns.py	0.00%	1 Missing ⚠️
libcloud/compute/drivers/ovh.py	0.00%	1 Missing ⚠️
libcloud/compute/drivers/rackspace.py	0.00%	1 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk    #2050      +/-   ##
==========================================
+ Coverage   83.37%   83.40%   +0.03%     
==========================================
  Files         353      353              
  Lines       81650    81684      +34     
  Branches     8627     8631       +4     
==========================================
+ Hits        68068    68124      +56     
+ Misses      10760    10738      -22     
  Partials     2822     2822              

Files with missing lines	Coverage Δ
libcloud/common/gandi.py	77.78% <100.00%> (ø)
libcloud/common/nfsn.py	78.57% <100.00%> (ø)
libcloud/common/ovh.py	79.35% <100.00%> (ø)
libcloud/compute/base.py	92.83% <100.00%> (ø)
libcloud/compute/drivers/abiquo.py	95.93% <100.00%> (+0.03%)	⬆️
libcloud/compute/drivers/cloudsigma.py	82.85% <100.00%> (ø)
libcloud/compute/drivers/gce.py	77.46% <ø> (-0.03%)	⬇️
libcloud/compute/drivers/opennebula.py	94.29% <100.00%> (ø)
libcloud/container/drivers/kubernetes.py	80.00% <100.00%> (ø)
libcloud/dns/drivers/rcodezero.py	71.88% <100.00%> (+1.04%)	⬆️
... and 21 more

... and 14 files with indirect coverage changes

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