Upgrade to PostgreSQL 14

[rgl]

Description

Upgrade to PostgreSQL 14.

Why is this needed

Besides all the major improvements made from PostgreSQL 10 to 14, there is one particular feature that I wanted to use:

A nicer way to work with JSON, like the hardware data model :-)

Fixes: #551

The sandbox MR is at tinkerbell/playground#110.

How Has This Been Tested?

Besides the unit tests executed by CI, I've successfully tested this locally in a sandbox, and PostgreSQL 14 is now running:

root@provisioner:~# docker exec -i compose-db-1 psql -U tinkerbell -A -c 'select version()'
version
PostgreSQL 14.0 on x86_64-pc-linux-musl, compiled by gcc (Alpine 10.3.1_git20210424) 10.3.1 20210424, 64-bit
(1 row)

How are existing users impacted? What migration steps/scripts do we need?

Checklist:

I have:

• updated the documentation and/or roadmap (if required)
• added unit or e2e tests
• provided instructions on how to upgrade

[codecov]

Codecov Report

Merging #552 (88615b0) into main (8208713) will not change coverage.
The diff coverage is n/a.

❗ Current head 88615b0 differs from pull request most recent head 6424388. Consider uploading reports for the commit 6424388 to get more accurate results

@@           Coverage Diff           @@
##             main     #552   +/-   ##
=======================================
  Coverage   34.76%   34.76%           
=======================================
  Files          44       44           
  Lines        3348     3348           
=======================================
  Hits         1164     1164           
  Misses       2085     2085           
  Partials       99       99           

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[nshalman]

I'm not sure why the DCO check isn't happy with your PRs. @rgl, any chance of updating this branch and getting the DCO check happy so that we can merge this?

[rgl]

@nshalman, it should work now. I'm not yet sure of what I'm doing wrong, but I'm always tripping the Sign-Off stuff, sorry about that.