Implement automated regression testing

[lydon42]

The CI/CD chain needs to be able to test a bitstream with all available unit tests.

For this a script is needed that can execute all those tests, record there results in log files, evaluate the combined result and report this back to the calling instance.

Parameters are a bitstream, a path to store the test logs and an optional device string to select the board to talk to.

Todo

• [ ] add field to regression test file that specifiers the platforms a test is intended for
  • [ ] need to remove hyperram test from platforms that don't have hyperram
• [ ] update old tests to support proper unit test reporting
  • [ ] test_332: needs to set video mode to PAL to function properly

[lydon42]

This is related to #108

[lydon42]

test_332 does not set video mode and coordinates are set for NTSC mode.

[lydon42]

Test 332 needs to properly switch to PAL mode on startup, as it is tuned (pixel wise) for that. It will fail if ran in NTSC mode.

[lydon42]

• [x] Bug: usbserial autodiscover needs to be able to match longer pnum sequences. Extend by one number, or make it arbitrary long?

[lydon42]

This works reasonably well, as the recent release test builds show. Now the infrastructure (jenkins, remote test hosts) and shell scripts (in core) have to be created.