feat: migrate to plugin-ci-workflows

[VikaCep]

Migrate to plugin-ci-workflows shared workflows

Closes #1235

Overview

Migrates our custom GitHub Actions CI/CD workflows to Grafana's standardized shared workflows from plugin-ci-workflows, following the provisioned-plugin-auto-cd pattern.

This migration enables:

• Argo CD-based deployments (replacing manual deployment-tools PRs)
• Alignment with Grafana plugins platform best practices
• Reduced maintenance burden (leveraging shared, battle-tested workflows)
• All existing functionality preserved

Changes

New Workflows

.github/workflows/push.yml (replaces on-pr-creation.yml + on-push-to-main.yml)

• On PRs: Runs CI (lint, test, build, typecheck) + custom validations
• On push to main: Runs CI + auto-deploys to dev via Argo CD + Release Please + TechDocs + bundle size tracking

.github/workflows/publish.yml (replaces dispatch_deploy-plugin.yml)

• Manual deployments to dev/ops/prod
• Can deploy any branch (including PRs) to dev for testing
• Supports docs-only deployments

Notes

After merging, we need to:

• Verify manual deployment to ops/prod
• Remove DangerJS fallback

⚠️ Tests performance
Tests now run without sharding, increasing CI duration, because the shared actions don't support it. This is an intentional trade-off for standardization and reduced maintenance. We can optimize test performance independently or work with the platform team to add sharding support if needed.

Requires https://github.com/grafana/deployment_tools/pull/436303

[github-actions]

Script size changes

Name	+/-	Main	This PR	Outcome
[767.js]	=	1,717.17 kB	1,717.17 kB	✅
[962.js]	=	976.83 kB	976.83 kB	✅
[datasource/module.js]	=	24.53 kB	24.53 kB	✅
[692.js]	=	20.57 kB	20.57 kB	✅
[663.js]	=	5.84 kB	5.84 kB	✅
[module.js]	=	4.92 kB	4.92 kB	✅

Totals

Name	+/-	Main	This PR	Outcome
[Scripts]	=	2,749.87 kB	2,749.87 kB	✅
[Non-script Assets]	=	2,668.53 kB	2,668.53 kB	✅
[All]	=	5,418.40 kB	5,418.40 kB	✅

Generated by 🚫 dangerJS against c3c387b

[VikaCep]

Verified deploying to dev works successfully:

• Action
• Argo workflow
• Argo posting to Slack
• Deployment tools PR
• Version deployed in catalog

• Version working in dev

[ckbedwell]

Great job! 👏

[VikaCep]

Note: needed to remove some old vault configs from deployment_tools otherwise the Argo workflow would fail randomly.