Github Actions: update the reporting for the levitate workflow (#43621)

* chore: stop checking out the repo and use the `unzip` command

* refactor: remove deprecated workflow script

* refactor: add whitespace around template variable

.github/workflows/scripts/get-workflow-run-artifact.js

@@ -1,45 +0,0 @@
-module.exports = async ({ github, context, core, runId, artifactName }) => {
-    try {
-        const AdmZip = require('adm-zip');
-        const fs = require('fs');
-
-        const { owner, repo } = context.repo;
-        const { data } = await github.rest.actions.listWorkflowRunArtifacts({
-            owner, 
-            repo, 
-            run_id: runId,
-        });
-    
-        const artifact = data.artifacts.find(a => a.name === artifactName);
-        
-        if (!artifact) {
-            throw new Error(`Could not find artifact ${artifactName} in workflow (${runId})`);
-        }
-    
-        const zip = await github.rest.actions.downloadArtifact({
-            owner,
-            repo,
-            artifact_id: artifact.id,
-            archive_format: "zip",
-        });
-    
-        const dir = `./tmp/${artifactName}`;
-        await mkdirRecursive(fs, dir);
-    
-        const admZip = new AdmZip(Buffer.from(zip.data));
-        admZip.extractAllTo(dir, true);
-
-        return dir;
-    } catch (error) {
-        core.restFailed(error.message);
-    }
-}
-
-async function mkdirRecursive(fs, path) {
-    return new Promise((resolve, reject) => {
-        fs.mkdir(path, { recursive: true }, (error) => {
-            if (error) return reject(error);
-            return resolve();
-        });
-    });
-}