Add an option to run all beta tests

[dawid-sabat]

Right now we have --beta option and we can run all tests in beta quality this way:

opendcdiag --beta -e test1 -e test2 ... -e test3

There might some value added to add an option called --all-beta-run.
Run with this option can be used to validate if the quality of existing beta tests is good enough to promote them to prod without making a list of tests and risking we miss something. We can also automate such runs with this option and don't bother with updating the beta test list.