d/control: add build-dep on linux-perf to include irqbalance docs
Starting with upstream 2.25.0-rc.1[1], plugin docs are automatically generated from source. ./compile_plugin_docs.py will loop over importing all plugins, and if one fails to import, it will be skipped. If the python3 perf module (from package bin:linux-perf) is not available, the irqbalance plugin will fail to import, and its documentation will not be generated.
Closes: #1109771