Upgrade to Docker Compose V2

[jdddog]

Upgrade Docker Compose to V2 as V1 won’t be supported from the end of June 2023 and will be removed from all Docker Desktop versions.

I've also updated a number of related things:

• Updated docs with Docker Compose V2 changes and Ubuntu install script.
• For VMs:
  • Updated VM image to Ubuntu 22.04 (Ubuntu 18.04 is end of life).
  • Updated Berglas to v1.0.1.
• Terraform:
  • Tidied up the firewall rules, which had to be updated after hashicorp/google updated.
  • Add versions restraints to the terraform/versions.tf so that the Terraform providers don't update to a new version without us doing it, which causes problems.

I've tested deploying the system to the cloud.

[codecov]

Codecov Report

Base: 91.98% // Head: 91.98% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (608c0fd) compared to base (f2b125b).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #602      +/-   ##
===========================================
- Coverage    91.98%   91.98%   -0.01%     
===========================================
  Files           48       48              
  Lines         6601     6599       -2     
  Branches       751      751              
===========================================
- Hits          6072     6070       -2     
  Misses         413      413              
  Partials       116      116              

Impacted Files	Coverage Δ
...servatory-platform/observatory/platform/cli/cli.py	82.51% <100.00%> (-0.29%)	⬇️
...form/observatory/platform/docker/compose_runner.py	100.00% <100.00%> (ø)
...orm/observatory/platform/docker/platform_runner.py	100.00% <100.00%> (ø)

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[keegansmith21]

Thanks for these changes Jamie!