Bug: Invalid collection properties are treated as valid if there are some valid values

[l0b0]

From "tests: Verify that provider processing properties are validated" commit:

This test fails because the collection is considered valid if the input
is valid according to any of the schemas in the anyOf on line 64
onwards. In other words, an invalid /providers/0/processing:expression
will only be detected if there are no other valid processing properties
elsewhere in the file.