only check sanity_check_components and sanity_check_all_components when Bundle easyblock is used in test_pr_sanity_check_paths

[boegel]

fix for failing easyconfig tests, introduced in #14591:

ERROR: test_pr_sanity_check_paths (test.easyconfigs.easyconfigs.EasyConfigTest)
Make sure a custom sanity_check_paths value is specified for easyconfigs that use a generic easyblock.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test/easyconfigs/easyconfigs.py", line 1030, in test_pr_sanity_check_paths
    bundle_sanity_check_components = ec['sanity_check_components'] or ec['sanity_check_all_components']
  File "/opt/hostedtoolcache/Python/2.7.18/x64/lib/python2.7/site-packages/easybuild/framework/easyconfig/easyconfig.py", line 125, in new_ec_method
    return ec_method(self, key, *args, **kwargs)
  File "/opt/hostedtoolcache/Python/2.7.18/x64/lib/python2.7/site-packages/easybuild/framework/easyconfig/easyconfig.py", line 1751, in __getitem__
    raise EasyBuildError("Use of unknown easyconfig parameter '%s' when getting parameter value", key)
EasyBuildError: "Use of unknown easyconfig parameter 'sanity_check_components' when getting parameter value"

[akesandgren]

LGTM

[akesandgren]

Going in, thanks @boegel!