[WIP] [RFC] [DO NOT SUBMIT] ci: piglit add some gl4.4 tests

Our current CI was implemented a while back when we only supported some old version of GL and GLES.
We know support OpenGL 4.3 (almost 4.4) but we have no unit tests in place for those new features.
Running the all CTS testsuite or piglit for each MR will be too time consuming.

I don't know what would be the perfect solution but here some ideas:
(1) Do something like this MR. Just add tests for the OpenGL version in development.
(2) Weekly/Monthly run all Piglit/CTS unit tests on Master.
(3) Pick some tests from each OpenGL version to run.

What do you think?