BibEdit: use regex to check record locking

• Optionally, use regex to check if bibupload tasks present in the bibsched queue may prevent record opening in BibEdit. The regexp technique is faster then the default bibrecord technique to check for possible record locking needs, but it may also be imprecise. The queue checking behaviour can be configured by altering CFG_BIBEDIT_QUEUE_CHECK_METHOD in 'invenio-local.conf'. By default, the precise technique is used.

Co-authored-by: Tibor Simko <tibor.simko@cern.ch>