Regression with versionsuffix types

[mboisson]

Commit 0e5ba5c858
introduced a check for string-type for versionsuffix, while None used to be an accepted value for versionsuffix. Our hooks replace many version suffixes with None.

[Flamefire]

Interestingly every falsy value was accepted. So next to empty string and None also False or an empty list.
I don't see how anything but string and None make sense here

So might be ok to break a potential abuse and only allow None next to the string type.

However the dependency dictionary spec converts a versionsuffix unconditionally into a string:

easybuild-framework/easybuild/framework/easyconfig/types.py

Lines 477 to 478 in cef915b

	if key == 'versionsuffix':
	depspec[key] = str(dep[key])

So when there versionSuffix: None is used the result will be "None", so maybe we should keep this small breaking change as the error message is very clear and replacing the hook to use an empty string works always.

[mboisson]

In the immediate, I will just hot-fix our copy of framework to remove that check (or allow None)

[mboisson]

ComputeCanada@59d2f54