[EPIC] Support Metrics Visualisation (Tensorboard)

[tchaton]

🚀 Feature

Motivation

TODOS:

• [] Visualize metrics during the Sweep training for PL (https://github.com/Lightning-AI/lightning-hpo/issues/59)
• [] Visualize metrics once Sweep / Trials are finished (https://github.com/Lightning-AI/lightning-hpo/issues/61)

Pitch

Alternatives

Additional context