be more careful when getting value of particular easyconfig parameter in PythonBundle and PythonPackage easyblock, to avoid trouble with unresolved template values

[boegel]

fixes the following failures in easyconfigs test suite:

• for PySide2-5.14.2.3-GCCcore-10.2.0.eb:

Failed to resolve all templates in "install --parallel=%(parallel)s" using template dictionary: ...

• for jax-0.4.25-gfbf-2023a.eb and jax-0.4.25-gfbf-2023a-CUDA-12.1.1.eb:

Failed to resolve all templates in "mkdir -p %(builddir)s/archives && cp %%s %(builddir)s/archives" using template dictionary: ...

edit: requires:

• add support for temporarily disabling requirement that all template values must resolve via EasyConfig.expect_resolved_template_values easybuild-framework#4726

[lexming]

LGTM

[boegel]

Hmm, still seeing trouble with jax-0.4.25-gfbf-2023a.eb, looking into it...

[lexming]

LGTM

[boegel]

Test report by @boegel

Overview of tested easyconfigs (in order)

• **FAIL (unhandled exception: 'parallel')Traceback (most recent call last):
  File "/user/gent/400/vsc40023/easybuild/eb5/easybuild-framework/easybuild/main.py", line 136, in build_and_install_software
  (ec_res['success'], app_log, err_msg, err_code) = build_and_install_one(ec, init_env)
  File "/user/gent/400/vsc40023/easybuild/eb5/easybuild-framework/easybuild/framework/easyblock.py", line 4461, in build_and_install_one
  result = app.run_all_steps(run_test_cases=run_test_cases)
  File "/user/gent/400/vsc40023/easybuild/eb5/easybuild-framework/easybuild/framework/easyblock.py", line 4329, in run_all_steps
  self.run_step(step_name, step_methods)
  File "/user/gent/400/vsc40023/easybuild/eb5/easybuild-framework/easybuild/framework/easyblock.py", line 4172, in run_step
  step_method(self)()
  File "/tmp/eb-z_4cu8a4/included-easyblocks-7zcba7r1/easybuild/easyblocks/generic/pythonpackage.py", line 835, in build_step
  build_cmd = build_cmd % {'python': self.python_cmd}
  KeyError: 'parallel'
  ** PySide2-5.14.2.3-GCCcore-10.2.0.eb
• SUCCESS jax-0.4.25-gfbf-2023a.eb

Build succeeded for 1 out of 2 (2 easyconfigs in total)
node3509.doduo.os - Linux RHEL 8.8, x86_64, AMD EPYC 7552 48-Core Processor, Python 3.6.8
See https://gist.github.com/boegel/09fa6bf1772030cc45961deba66881d6 for a full test report.

[boegel]

crash for PySide2 is being fixed in:

• inject custom '%(python)s' template value before getting value of 'buildcmd' custom easyconfig parameter in PythonPackage easyblock #3539

[Flamefire]

I would prefer if we'd use .get(...resolve=False) instead of getref(...) as the former is more clear in the intention. The latter was intended for getting the original list to be able to modify it.