Reana-server

- Changes `quota-set` command used by the REANA administrators to use the resource type along with a resource name for specifying the resource.
- Changes email validation used in `create-admin-user` command by the REANA administrators to be more permissive.

- Adds users quota accounting.
- Adds support for Snakemake workflow engine.
- Adds `include_progress` and `include_workspace_size` query args to workflow list endpoint.
- Adds workflow prioritization in the queue by complexity.
- Adds `priority` and `min_job_memory` params to workflow submission publisher.
- Adds Yadage workflow specification loading to `start_workflow` endpoint.
- Adds a check in scheduler if at least one workflow job could be started in Kubernetes.
- Adds configuration environment variable to set workflow scheduling policy (`REANA_WORKFLOW_SCHEDULING_POLICY`).
- Adds configuration environment variable to set a timeout between consuming workflows (`REANA_SCHEDULER_REQUEUE_SLEEP`).
- Adds configuration environment variable to set an API rate limiter (`REANA_RATELIMIT_AUTHENTICATED_USER`, `REANA_RATELIMIT_GUEST_USER`).
- Adds new `info` endpoint allowing to retrieve information about cluster capabilities such as available workspaces.
- Changes workflow execution consumer to receive only one message at a time.
- Changes to PostgreSQL 12.8.

- Changes internal dependencies.

- Adds support for listing files using glob patterns.
- Adds support for glob patterns and directory downloads, packaging the content into a zip file.

- Adds configuration to set a timeout between `reana_ready` checks. (`REANA_SCHEDULER_SECONDS_TO_WAIT_FOR_REANA_READY`)
- Fixes start workflow endpoint to work with unspecified `operational_options` parameter
- Fixes workflow scheduling bug in which failed worfklows would count as running, reaching `REANA_MAX_CONCURRENT_BATCH_WORKFLOWS` and therefore, blocking the `job-submission` queue.

- Adds optional email confirmation step after users sign up.
- Changes email notifications with enriched instructions on how to grant user tokens.