Use cached_get_entity_by

Summary

Replace Crawler._get_entity_by... by cached versions of pylib.

Please track on https://gitlab.indiscale.com/caosdb/customers/umg/management/-/issues/84

Test Environment

unit and int tests

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integrationtests/test_issues.py

@@ -19,6 +19,7 @@
 from pytest import fixture, mark
 
 import caosdb as db
+from caosdb.cached import cache_clear
 
 from caoscrawler.crawl import Crawler
 from caoscrawler.identifiable_adapters import CaosDBIdentifiableAdapter