fix: CICD pipeline to use Runner to Upload images to ECR

[jcabrero]

Summary

This PR main motivation is fixing a bug that used all storage space in Github action runners and prevented from uploading the artifacts to ECR.Optimize CI pipeline for better performance and reliability by leveraging self-hosted runners for image building and deployment.

Key Changes

Consolidated Build & Push Pipeline

• Before: Images built twice - once on self-hosted runner for E2E tests, then rebuilt on GitHub runners for ECR push
• After: Images built once on self-hosted runner and conditionally pushed to ECR from the same environment

Parallel Image Building

• Introduced matrix strategy with 3 concurrent runners (runners-per-machine: 3)
• Build jobs for vllm, attestation, and api now run in parallel
• Push jobs also parallelized for faster ECR uploads

📦 vLLM Size Compatibility

• Updated vLLM from 0.7.3 → 0.10.1 increases image size beyond GitHub Actions limits
• Self-hosted runner approach resolves size constraints

Pipeline Flow

test → start-runner → [build-images × 3] → e2e-tests → [push-images × 3] → stop-runner

Performance Improvements

• ~3x faster builds: Parallel execution vs sequential
• ~50% faster overall: Eliminates duplicate image builds
• Better resource utilization
• Cleaner logs: Matrix jobs provide individual status and failure isolation

[Copilot]

Pull Request Overview

This PR optimizes the CI/CD pipeline by consolidating image building and ECR pushing to self-hosted runners, eliminating duplicate builds and resolving storage constraints from larger vLLM images.

• Introduces parallel matrix builds for vllm, attestation, and api images using 3 concurrent self-hosted runners
• Moves image building from E2E test job to dedicated build-images job that runs before tests
• Replaces GitHub runners with self-hosted runners for ECR push operations to handle larger image sizes

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[Copilot]

Using outdated checkout action version v2. Should use actions/checkout@v4 for better performance and security features, consistent with other jobs in the workflow.

Suggested change

	uses: actions/checkout@v2
	uses: actions/checkout@v4

[Copilot]

Using outdated aws-actions/configure-aws-credentials@v1. Should use v4 for consistency with the push-images job and to benefit from latest security updates and features.

Suggested change

	uses: aws-actions/configure-aws-credentials@v1
	uses: aws-actions/configure-aws-credentials@v4