Edge containers2

[gilesknap]

This is a major overhaul with a major version number increment.

Features in this PR:

• update to support arbitrary services instead of IOCs only
• restructure of the beamline (or services or accelerator group) repository to match with the new copier template https://github.com/epics-containers/ec-services-template
• remove references to IOC to make this more generic
• remove the ioc and dev and k8s CLI namespaces, move the ioc functions to the root namespace
• based this project on the python copier project for update-able CI etc. https://github.com/DiamondLightSource/python-copier-template
• renamed the project to edge-containers-cli from epics-containers-cli
• switched to using ONLY helm's appVersion for determining the version of a service (thus removing any constraints on the service's helm charts)
• added use of helm package to get appVersion into the deployed package
• added pandas for interpreting and combining output from helm and kubectl
• dropped python 3.8 support

I've made this a draft because it needs to be merged alongside:

• major update to the epics-containers tutorials - TBD
• update of all beamline repositories to the new template - bl47p only is done so far.
• update ec-helm-charts to match - PR is ready https://github.com/epics-containers/ec-helm-charts/pull/7
• NO CHANGES REQUIRED:
  • generic IOC projects
  • ibek-support
  • NICE TO HAVE
  • also switch generic IOC projects to copier template - This is quite easy as there will be few Qs and only README, Dockerfile need templating.

[gilesknap]

@marcelldls this is a monster PR so I don't really expect a complete review. This is more for interest and you could take quick glance.

@coretl FYI

[codecov-commenter]

Codecov Report

Attention: 31 lines in your changes are missing coverage. Please review.

Comparison is base (e05e019) 87.03% compared to head (531a0aa) 78.09%. Report is 1 commits behind head on main.

Files	Patch %	Lines
src/ec_cli/cmds/k8s_commands.py	78.16%	19 Missing :warning:
src/ec_cli/cmds/cli.py	93.84%	4 Missing :warning:
src/ec_cli/cmds/helm.py	91.30%	4 Missing :warning:
src/ec_cli/utils.py	84.21%	3 Missing :warning:
src/ec_cli/shell.py	66.66%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #96 +/- ## ========================================== - Coverage 87.03% 78.09% -8.95% ========================================== Files 18 14 -4 Lines 1003 840 -163 ========================================== - Hits 873 656 -217 - Misses 130 184 +54 ```

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