Generate generic skip marker on cloud

[Deblintrake09]

During work on Issue #2305, it was requested the generation of a generic skip marker that can be added to tests to be skipped on cloud environments.

This marker can be generated by taking advantage of the new could_config.yaml file and the skip_cloud flag that are added in Issue #2305.

The proposed marker could be added on the general test/integration/conftest.py file with something like this:

if global_parameters.cloud_config is not None:
mark_skip_cloud = pytest.mark.skipif( global_parameters.cloud_config[skip_cloud]== 'yes', reason="test skipped on cloud instances - Issue #").

then the mark can be added to a test with the simple decorator before the test:

@mark_skip_cloud

[damarisg]

We decided to close them as it was not planned.