build_regex_from_schema(): Incorrect behavior for oneOf and allOf

[lapp0]

Describe the issue as clearly as possible:

Pattern repetition cannot be used when one repetition is dependent on another repetition in and array or object
For example, when handling an array in json_schema.py we use

elif instance_type == "array":
    ...
    items_regex = to_regex(resolver, instance["items"], whitespace_pattern)
    return rf"\[{whitespace_pattern}(({items_regex})(,{whitespace_pattern}({items_regex})){num_repeats}){allow_empty}{whitespace_pattern}\]"

Repetition works with anyOf because the types of items are independent. This is not true for allOf or oneOf.

oneOf and allOf require knowledge of the types of other items in order to produce a valid item.

For example, if we want oneOf("string", "number") with length 2, we cannot use (STRING|NUMBER){2}, we must use STRING{2}|NUMBER{2}