Hang when parsing a type string for an unpulled type in an attached type archive in a remote project

[negasora]

Repro steps:

1. Open a bndb in a remote project
2. Run the following in the python console:

import tempfile

with tempfile.TemporaryDirectory() as td:
    print(td)
    ta = TypeArchive.create(path=str(f'{td}/archive.bnta'), platform=bv.platform)
    assert ta is not None
    bv.attach_type_archive(ta)
    ta.add_type("archive_type", binaryninja.Type.int(4))
    print(bv.parse_type_string('archive_type asd;'))

[CouleeApps]

CC https://github.com/Vector35/binaryninja/issues/736

[fuzyll]

This appears to have been fixed as of the commit that landed in 4.3.6677-dev. I cannot reproduce the hang in 4.3.6803-dev, at least.