Fix typos in the code using "codespell" package, enforce codespell check as part of CI

[Kami]

This PR fixes minor typos in the code using codespell package (https://pypi.org/project/codespell/).

It also updates CI to run this tool as part of the lint job.

[codecov-commenter]

Codecov Report

Merging #1923 (86d92d2) into trunk (2b1b3d4) will not change coverage.
The diff coverage is 77.78%.

❗ Current head 86d92d2 differs from pull request most recent head 86456d9. Consider uploading reports for the commit 86456d9 to get more accurate results

@@           Coverage Diff           @@
##            trunk    #1923   +/-   ##
=======================================
  Coverage   83.12%   83.12%           
=======================================
  Files         353      353           
  Lines       81351    81351           
  Branches     8594     8594           
=======================================
  Hits        67622    67622           
  Misses      10924    10924           
  Partials     2805     2805           

Files Changed	Coverage Δ
libcloud/common/base.py	90.96% <ø> (ø)
libcloud/common/cloudstack.py	86.60% <ø> (ø)
libcloud/common/dimensiondata.py	94.92% <ø> (ø)
libcloud/common/gridscale.py	83.93% <ø> (ø)
libcloud/common/nttcis.py	73.59% <ø> (ø)
libcloud/common/openstack.py	85.32% <ø> (ø)
libcloud/common/upcloud.py	92.00% <ø> (ø)
libcloud/common/worldwidedns.py	63.44% <0.00%> (ø)
libcloud/compute/drivers/abiquo.py	95.90% <ø> (ø)
libcloud/compute/drivers/cloudscale.py	85.71% <ø> (ø)
... and 49 more