BE: Add new query API to list workspace ports

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MR: Pending

Description

We want to introduce a new graphQL type for workspace ports that contains all the fields introduced in the workspaces_ports table and add the relevant resolvers and connections to query the fields for this new type.

Acceptance Criteria

• New graphQL type for workspace_ports
• Method to return access_url with the format #{port_number}-#{workspace_name}.#{agent_dns_zone}
• New field for workspace_ports in the workspace type
• New finder/resolver for workspace_ports field
• GraphQL docs updated
• Check README for info on writing resolvers and specs
• Add relevant request specs to the ee/spec/requests/api/graphql/remote_development/workspace folder
• Add unit tests for finder
• Update tests.yml and scripts/verify-tff-mapping
• Read and update ee/spec/requests/api/graphql/remote_development/README.md
• Update remote_development integration_spec.rb to test the new fields

Technical Requirement

GraphQL changes

• Type.workspace

  	name	type
  field	workspacePorts	[WorkspacePort!]

• Type.workspacePort

  	name	type
  field	id	GlobalIDType[::RemoteDevelopment::WorkspacePort]
  field	portNumber	Int
  field	portType	Enum [default,user_defined]
  field	accessUrl	String
  field	createdAt	TimeType
  field	updatedAt	TimeType

• Fields for the new Type should be marked experimental according to mark-schema-items-as-experiments