Create a generic K8S deployment workflow

[ygrishajev]

Currently we have CICD handling releases and image builds. We need to now automate deploys to k8s.

Acceptance criteria:

• should be a generic workflow which should know how to deploy our services to k8s. For this task it should care about api and deploy-web
• should be triggered by both workflow_call and workflow_dispatch to make sure we can trigger it both manually and re-use in other workflows
• release-api and release-deploy-web workflows should be updated to deploy to beta after image build job
• doc/release-workflow.md should be updated accordingly

Depends on #538 and #537