[ISV-5618] Fix check_upgrade_graph_loop for community operators

[mporrato]

• Update the static test to use proper dfs cycle detection to avoid performance issues leading to timeouts with operators using skipRange
• Convert the static check into an Operator static check (as opposed to a Bundle static check) as it involves parsing multiple bundles
• Fix log messages emitted by the skip_fbc decorator

This change was tested against all the community operators and no performance issues were found; however, the following operators fail the check because of issues with metadata (either the replaces field being set to an empty string or invalid skipRange definitions):

• enc-key-sync
• hedvig-operator
• logging-operator
• mongodb-operator
• oadp-operator
• odoo-operator
• openshift-nfd-operator
• rabbitmq-single-active-consumer-operator
• special-resource-operator

None of those operators have received updates in the last 1.5 years.

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[tomasbakk]

LGTM