chore(test): Add config file option to e2e metal tooling

[Callisto13]

Note: the last 2 commits are file formatting only and disguise other things which have happened

What this PR does / why we need it:

This PR adds a bit of nice UX to the e2e python tool.

Users can now pass a config file:

./test/tools/run.py -c <path to file>

Which looks like this:

---
org_id: "test-org" # required
project: "test-project" # or project ID
test:
  skip_delete: false # skip the test cleanup and process teardown steps
  skip_teardown: false # skip tearing down the equinix infra
  skip_dmsetup: true # skip the thinpool setup, this should always be true for equinix
  containerd_log_level: "debug"
  flintlock_log_level: "2"
device:
  name: "test-device" # omit if device.id set
  id: "abcdef123456" # set if using existing device
  ssh_key_name: "test-key"
  # the following mirror the equinix options
  # see https://metal.equinix.com/developers/docs/ for values
  userdata: "echo hello"
  plan: "c1.small.x86"
  metro: "sv"
  operating_system: "ubuntu_18_04"
  facility: "ewr1"
  billing_cycle: "hourly"

Each new instance of Config will be initialised with a set of default
config. These are just the values I happened to be hardcoding before,
and there was no special reason for any of them, but they work.

Config can then be loaded from a file and validated against a schema.
This config will then overwrite the appropriate values in the object
config.

Config can also be altered via flags. The 'final' config at that point
can be validated.

The validation is all a bit naive right now as I didn't want to get too
into it.

Not all device config options exist yet, but it is fairly trivial to add as
needed later.

Special notes for your reviewer:

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests

[codecov-commenter]

Codecov Report

Merging #249 (aa5916e) into main (fe9bb9f) will decrease coverage by 15.52%.
The diff coverage is 41.78%.

@@             Coverage Diff             @@
##             main     #249       +/-   ##
===========================================
- Coverage   55.81%   40.29%   -15.53%     
===========================================
  Files          44       46        +2     
  Lines        2012     2169      +157     
===========================================
- Hits         1123      874      -249     
- Misses        781     1236      +455     
+ Partials      108       59       -49     

Impacted Files	Coverage Δ
core/application/commands.go	71.66% <ø> (+2.70%)	⬆️
core/application/reconcile.go	0.00% <ø> (ø)
core/models/vmid.go	90.24% <ø> (ø)
core/models/volumes.go	0.00% <ø> (ø)
core/steps/microvm/delete.go	100.00% <ø> (ø)
core/steps/runtime/dir_create.go	73.07% <ø> (ø)
core/steps/runtime/dir_delete.go	81.81% <ø> (ø)
core/steps/runtime/initrd_mount.go	100.00% <ø> (ø)
core/steps/runtime/kernel_mount.go	100.00% <ø> (ø)
infrastructure/containerd/content.go	0.00% <0.00%> (-100.00%)	⬇️
... and 37 more

---

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[yitsushi]

Standard python style is to use multiples of 4 spaces as indentation.
Even if it stays at 3 spaces, the indentation is not consistent, there are places where it's 4 spaces and there are places where it's 3 spaces. All can be auto-fixed with autoformat tools like autopep8, yapf -i or black.

Other than that, some comments, but lgtm

[Callisto13]

Standard python style is to use multiples of 4 spaces as indentation.
Even if it stays at 3 spaces, the indentation is not consistent, there are places where it's 4 spaces and there are places where it's 3 spaces. All can be auto-fixed with autoformat tools like autopep8, yapf -i or black.

lol i thought the spacing looked a bit different between files 😂 , but i didn;t want to do all that before review otherwise it would make the general pr diff huge. i will format them all right before merge