support limit max topics per namespace

[hangc0276]

Fix #8225

Changes

1. Add topic partition number limit, which only take persistent topic into account, for each namespace
2. The max topic number of each namespace can only be configured by broker.conf, i will make it configurable dynamic soon
3. Add the tests for this feature.

[hangc0276]

/pulsarbot run-failure-checks

[hangc0276]

/pulsarbot run-failure-checks

[aahmed-se]

The limit should be per namespace.

[sijie]

@aahmed-se :

The limit should be per namespace.

We usually add a default setting to broker/cluster-level first. Then add the setting to the namespace policy. We should make it consistent.

[sijia-w]

@hangc0276 @Anonymitaet Shall we add description to this section https://pulsar.apache.org/docs/en/concepts-messaging/#namespaces? I appreciate your confirmation.

[Anonymitaet]

@sijia-w I think the doc for this newly added configuration maxTopicsPerNamespace should be added to the configuration section:

• broker
• standalone

Need to add configuration name, descriptions, and the default value (0).

@hangc0276 Please correct me if I'm wrong, thanks.