bouha0

### What is the problem this feature will solve? tensorboard vizualisation shows only validation Top-1 top-5 graph by epcoh or step , and training graph for both metric are separate...

### Branch main branch (1.x version, such as `v1.0.0`, or `dev-1.x` branch) ### Prerequisite - [X] I have searched [Issues](https://github.com/open-mmlab/mmaction2/issues) and [Discussions](https://github.com/open-mmlab/mmaction2/discussions) but cannot get the expected help. - [X]...