Is your enhancement request related to a problem? Please describe.
In the broker.conf configuration, there are these configurations:

• allowAutoTopicCreation
• allowAutoTopicCreationType
• defaultNumPartitions
• maxNumPartitionsPerPartitionedTopic
• brokerDeleteInactiveTopicsEnabled
• brokerDeleteInactiveTopicsFrequencySeconds
• brokerDeleteInactiveTopicsMaxInactiveDurationSeconds
• brokerDeleteInactivePartitionedTopicMetadataEnabled
• brokerDeleteInactiveTopicsMode
• allowAutoSubscriptionCreation

I think these should be dynamically configurable.

Describe the solution you'd like
can use pulsar-admin brokers update-dynamic-config --config xxx --value xxx

Describe alternatives you've considered
Pulsar has namespace-level policy, but the broker-level configuration is missing.

Additional context
I'm more than willing to fix this, please assign me if it needs to be done