Update apachepulsar/pulsar Docker tag to v2.11.0

This MR contains the following updates:

Package	Type	Update	Change
apachepulsar/pulsar	ironbank-docker	minor	2.10.3 -> 2.11.0
apachepulsar/pulsar		minor	2.10.3 -> 2.11.0
apachepulsar/pulsar	stage	minor	2.10.3 -> 2.11.0

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