Add .on_push_begin() callback to Trainer and implement for TrackioCallback

[abidlabs]

What does this PR do?

Fixes # (issue)

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[qgallouedec]

Suggested change

	import trackio
	trackio_version = packaging.version.parse(trackio.__version__)
	if trackio_version <= packaging.version.parse("0.12.0"):
	return
	space_url = trackio.sync(project, force=True)
	trackio_version = packaging.version.parse(self._trackio.__version__)
	if trackio_version <= packaging.version.parse("0.12.0"):
	return
	space_url = self._trackio.sync(project, force=True)

[qgallouedec]

I'd recommend forcing trackio>=0.12 directly in the callback init

[abidlabs]

Thanks @qgallouedec what do you mean by forcing? In a way that would not break any existing scripts using an older version of Trackio? I could raise a warning here if using an older version of Trackio

[github-actions]

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[SunMarc]

Thanks a lot ! No strong opinion about forcing users to download the latest version of trackio or not.