Increase the metric of topic current limit time

**Is your feature request related to a problem? Please describe.**
When a topic is set to current limit, it is currently uncertain whether it is restricted and how long it has been restricted. I hope that an metric can be added to the broker to view the specific current limit.

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**Describe alternatives you've considered**
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**Additional context**
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Start by locating the broker code that applies topic current limits and reviewing its existing metrics. The work is done when a metric clearly shows whether a topic is currently restricted and how long that restriction has lasted, with coverage for the reported state.

Written by the indexing model from the issue text.