Packaging: Use cloud extra to install relevant packages

[amotl]

About

Don't install croud by default. It will not work on Python 3.7.

References

• Problem: https://github.com/crate/crash/actions/runs/7588894584/job/20672385743?pr=408
• Unblocks: Use testcontainers to improve platform coverage crash#408.

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (6343c73) 84.93% compared to head (49e4838) 84.82%.

Files	Patch %	Lines
cratedb_toolkit/cluster/util.py	66.66%	2 Missing ⚠️
cratedb_toolkit/util/croud.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #101      +/-   ##
==========================================
- Coverage   84.93%   84.82%   -0.11%     
==========================================
  Files          48       48              
  Lines        1805     1812       +7     
==========================================
+ Hits         1533     1537       +4     
- Misses        272      275       +3     

Flag	Coverage Δ
influxdb	41.33% <42.85%> (-1.33%)	⬇️
main	66.83% <64.28%> (-0.15%)	⬇️
mongodb	55.90% <42.85%> (-1.39%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.