Revert "Upgrade Artifact actions v4"

[KyleJu]

Reverts #6910. Looks like it broke the auto approve:

https://github.com/web-platform-tests/wpt-metadata/actions/runs/11733818725/job/32688788109

[Ms2ger]

I know nothing, but if you need a stamp, here's one :)

[jcscottiii]

@KyleJu,

Given that we will have to solve this problem again when we switch this back to v4, I have an idea that you may want to try.

The failure you linked showed that it failed to download the artifact.
Looking at the release notes for the upload-artifact action, I see the following text:

Artifacts created with versions v3 and below are not compatible with the v4 actions. Uploads and downloads must use the same major actions versions.

I wonder if we should instead take a look at the download logic that looks to be outdated:

wpt-metadata/.github/workflows/auto-approve.yml

Lines 31 to 53 in 45bb848

	uses: actions/github-script@v3.1.0
	with:
	script: |
	console.log("Starting to list artifacts");
	var artifacts = await github.actions.listWorkflowRunArtifacts({
	owner: context.repo.owner,
	repo: context.repo.repo,
	run_id: context.payload.workflow_run.id,
	});
	console.log("Filtering artifacts");
	var matchArtifact = artifacts.data.artifacts.filter((artifact) => {
	return artifact.name == "pr_number"
	})[0];
	console.log("Downloading artifacts");
	var download = await github.actions.downloadArtifact({
	owner: context.repo.owner,
	repo: context.repo.repo,
	artifact_id: matchArtifact.id,
	archive_format: 'zip',
	});
	console.log("Writing artifacts to disk");
	var fs = require('fs');
	fs.writeFileSync('${{github.workspace}}/pr.zip', Buffer.from(download.data));

It is using actions/github-script@v3.1.0, which I suspect is using artifact API v1 vs artifact API v2. (not 100% sure though).

Could you instead create a separate PR that adjusts auto-approve.yml to use actions/github-script@v7?

You can see an example of another repository doing it: https://github.com/platisd/clang-tidy-pr-comments/blob/88780c4ca5471b97de8f228219d1e39b1a472142/README.md?plain=1#L265-L283