Agent: Migrate CI from Drone to GH Actions

[jharvey10]

Pull Requests

• Test dashboards
• Test crds
• Test
• check linux build image
• check linux build image (boring crypto)
• check windows build image
• Build agent (Linux amd64)
• Build agent (Linux arm64)
• Build agent (Linux ppc64le)
• Build agent (Linux s390x)
• Build agent (macOS Intel)
• Build agent (macOS Apple Silicon)
• Build agent (Windows amd64)
• Build agent (FreeBSD amd64)
• Build agent-flow (Linux amd64)
• Build agent-flow (Linux arm64)
• Build agent-flow (Linux ppc64le)
• Build agent-flow (Linux s390x)
• Build agent-flow (macOS Intel)
• Build agent-flow (macOS Apple Silicon)
• Build agent-flow (Windows amd64)
• Build agent-flow (FreeBSD amd64)
• Build agentctl (Linux amd64)
• Build agentctl (Linux arm64)
• Build agentctl (Linux ppc64le)
• Build agentctl (Linux s390x)
• Build agentctl (macOS Intel)
• Build agentctl (macOS Apple Silicon)
• Build agentctl (Windows amd64)
• Build agentctl (FreeBSD amd64)
• Build operator (Linux amd64)
• Build operator (Linux arm64)
• Build operator (Linux ppc64le)
• Build operator (Linux s390x)
• Build operator (macOS Intel)
• Build operator (macOS Apple Silicon)
• Build operator (Windows amd64)
• Build operator (FreeBSD amd64)
• Build agent-boringcrypto (Linux amd64 boringcrypto)
• Build agent-boringcrypto (Linux arm64 boringcrypto)
• Build agent-flow-windows-boringcrypto (Windows amd64)

Pushes to main

• Build matrix
• Test (Full)
• Test (Windows)
• Check Linux container (grafana/agent)
• Publish Linux agent container
• Publish Linux agent-boringcrypto container
• Publish Linux agentctl container
• Publish Linux agent-operator container
• Publish Windows agent container
• Publish Windows agentctl container
• Deploy to deployment_tools

Pre-existing checks

• Release Helm chart / release (currently broken)
• continuous-integration/drone/push (no longer needed)
• continuous-integration/drone/tag (no longer needed)
• Integration Tests / run_tests
• Release Helm chart / setup
• Snyk Monitor Scanning / snyk-scan-ci / snyk_scans
• Test / Test (macos-latest-xlarge)

Pushes to build-images/*

• Update build images