Fix Past CI not running against the latest main

[ydshieh]

What does this PR do?

Fix Past CI not running against the latest main. See comment in the changes.

[ydshieh]

The workflow file self-past.yml, when used in a workflow_call, accept some inputs including sha:

transformers/.github/workflows/self-past.yml

Lines 10 to 22 in 0670ccb

	workflow_call:
	inputs:
	framework:
	required: true
	type: string
	version:
	required: true
	type: string
	# Use this to control the commit to test against
	sha:
	default: 'main'
	required: false
	type: string

Previously, the Past CI is launched manually by @ydshieh, and the goal is to targe a fixed & specific commit for some runs (so we can compare the results before/after the fixes). At that time, it was launched only once during a few months.

Right now, we run it twice per week, see #22393, it makes more sense to run the CI against latest main. Otherwise, the reports of the (automatically triggered) runs will contain failures that have been fixed on main and hard to understand at the 1st galance.

[ydshieh]

pass the commit sha of the triggered event to past workflow file.

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[sgugger]

Thanks!