Allow string argument for disable/enable/exclude

[svlandeg]

Description

When loading an nlp pipeline, we assumed and documented that disable, enable and exclude should be lists, but this wasn't enforced or checked, resulting in silent odd behavior when giving these arguments a single string:

nlp = spacy.load("en_core_web_md", disable="tok2vec")
print(nlp.pipe_names)
#  ['tok2vec', 'tagger', 'parser', 'attribute_ruler', 'lemmatizer', 'ner']
print(nlp._disabled)
# {'t', 'e', 'senter', 'c', 'v', 'o', 'k', '2'}

exclude="tok2vec" did in fact work, by accident, because "tok2vec" in "tok2vec" equals True because of substring comparisons.

In this PR, we broaden the typing of the loading functions to include str as an option, and turn the string into a list before anything else. This makes the functionality consistent with the current implementation of nlp.select_pipes, which also caters for both a single string and a list. Note that the implementation of _resolve_component_status was allowing for disable to be str but the typing didn't reflect that, so I updated that as well.

As part of the docs update, I also added the 3.4 tags for the new enable argument from #10784

Types of change

bug/consistency fix

Checklist

• I confirm that I have the right to submit this contribution under the project's MIT license.
• I ran the tests, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.