Pipeline Graph: Add ability to switch between views

What does this MR do?

This MR is an interstitial MR for #298930 (closed). The code in this is behind the pipeline_graph_layers_view and graphql_pipeline_details flags. This step follows !56865 (merged).

It adds the ability to switch between a graph sorted by stage and one sorted by layers. It covers making it so that the graph does not need to be res-sorted every time we poll.

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

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Availability and Testing

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Related to #298930 (closed)