[Enhance] Support configuring directory used to synchronize results in BaseMetric (#1074)

* [Enhance] Support configuring synchronize directory for BaseMetric

* Raise error if tmpdir is not an shared dirctory for ann ranks

* Raise error if tmpdir is not an shared dirctory for ann ranks

* Update mmengine/evaluator/metric.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* refine

* Update mmengine/evaluator/metric.py

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Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>