feat: added missing fields on TopicStats

[jffp113]

Motivation

When using the admin api with golang there is some missing fields on topic stats:
https://pulsar.apache.org/docs/next/admin-api-topics/#get-stats

Modifications

Added missing fields on topic stats

Does this pull request potentially affect one of the following parts:

If yes was chosen, please highlight the changes

• Dependencies (does it add or upgrade a dependency): no
• The public API: yes
• The schema: yes
• The default values of configurations: no
• The wire protocol: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? PulsarDoc
• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[RobertIndie]

Could you add a test to verify that it could get these stats correctly?

[geniusjoe]

I think we need to add GetPartitionedStats and GetPartitionedStatsWithOption interface test cases in topic_test.go. Since make test command will automatically deploy a pulsar broker in test period, it is quite easy to write test cases. And we can refer TestPartitionStats test case in the latest default branch.