Replace parallel by maxparallel

[Flamefire]

The latter is the new, better option which makes it clear how it works with --parallel passed in the config or commandline.

5.x target of #19374 required by easybuilders/easybuild-framework#4398

Note: CI fails for unrelated reasons and fixing all those ECs is unfeasible, so I'd suggest to bite the bullet and merge this even though CI fails.

[Flamefire]

@boegel Resolved conflicts

[boegelbot]

@Flamefire: Tests failed in GitHub Actions, see https://github.com/easybuilders/easybuild-easyconfigs/actions/runs/7421645944
Output from first failing test suite run:

FAIL: test_pr_CMAKE_BUILD_TYPE (test.easyconfigs.easyconfigs.EasyConfigTest)
Make sure -DCMAKE_BUILD_TYPE is no longer used (replaced by build_type)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/runner/work/easybuild-easyconfigs/easybuild-easyconfigs/test/easyconfigs/easyconfigs.py", line 1278, in test_pr_CMAKE_BUILD_TYPE
    self.fail('\n'.join(failing_checks))
AssertionError: build_type was set to the default of 'Release'. Omit this to base it on toolchain_opts.debug: kim-api-2.3.0-GCC-11.2.0.eb
build_type was set to the default of 'Release'. Omit this to base it on toolchain_opts.debug: kim-api-2.3.0-GCC-11.3.0.eb

----------------------------------------------------------------------
Ran 8672 tests in 342.400s

FAILED (failures=1)
ERROR: Not all tests were successful

bleep, bloop, I'm just a bot (boegelbot v20200716.01)
Please talk to my owner @boegel if you notice me acting stupid),
or submit a pull request to https://github.com/boegel/boegelbot fix the problem.

[Flamefire]

Rebased and updated. Let's see what CI says ;-)

[boegelbot]

@Flamefire: Tests failed in GitHub Actions, see https://github.com/easybuilders/easybuild-easyconfigs/actions/runs/8078615944
Output from first failing test suite run:

FAIL: test_pr_CMAKE_BUILD_TYPE (test.easyconfigs.easyconfigs.EasyConfigTest)
Make sure -DCMAKE_BUILD_TYPE is no longer used (replaced by build_type)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/runner/work/easybuild-easyconfigs/easybuild-easyconfigs/test/easyconfigs/easyconfigs.py", line 1317, in test_pr_CMAKE_BUILD_TYPE
    self.fail('\n'.join(failing_checks))
AssertionError: build_type was set to the default of 'Release'. Omit this to base it on toolchain_opts.debug: kim-api-2.3.0-GCC-11.2.0.eb
build_type was set to the default of 'Release'. Omit this to base it on toolchain_opts.debug: kim-api-2.3.0-GCC-11.3.0.eb

----------------------------------------------------------------------
Ran 9039 tests in 353.192s

FAILED (failures=1)
ERROR: Not all tests were successful

bleep, bloop, I'm just a bot (boegelbot v20200716.01)
Please talk to my owner @boegel if you notice me acting stupid),
or submit a pull request to https://github.com/boegel/boegelbot fix the problem.