ci: use reusable workflows from pyTooling/Actions

[umarcor]

In this PR, the CI Pipeline is reworked in order to use reusable workflows from pyTooling/Actions (see pyTooling/Actions#1).

Each job is replaced with a call to a reusable workflow, except VerifyDocs. That's because VerifyDocs in this repo requires GHDL. However, that's actually an advantage of having 10 reusable workflows (one per job), instead of a single constrained reusable workflow.

The logic for dealing with global parameters is changed. Currently, GitHub Actions does not support using global env variables as arguments when calling reusable workflows (see actions/runner#480). As a workaround, job Params generates a JSON struct of values that can be later used in other jobs.

MPORTANT: reusable workflows must be used through an absolute name and specifying a version (see actions/runner#1493). Therefore, this PR will be kept as a draft, because s/@dev/@main/ is required in Pipeline.yml before merging.

[codecov]

Codecov Report

Merging #36 (c5c8555) into dev (e40e3b9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev      #36   +/-   ##
=======================================
  Coverage   74.12%   74.12%           
=======================================
  Files           4        4           
  Lines        2307     2307           
  Branches      355      355           
=======================================
  Hits         1710     1710           
  Misses        584      584           
  Partials       13       13           

Flag	Coverage Δ
unittests	74.12% <ø> (ø)

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

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e40e3b9...c5c8555. Read the comment docs.