Deprecations

[maelle]

Fix #2848

The vignette might need more tweaks but do we want to keep it?

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if de0cd74 is merged into main:

• ✔️as_adjacency_matrix: 836ms -> 840ms [-0.55%, +1.37%]
• ✔️as_biadjacency_matrix: 846ms -> 840ms [-1.42%, +0.17%]
• ✔️as_data_frame_both: 1.75ms -> 1.75ms [-0.92%, +1.04%]
• ✔️as_long_data_frame: 4.25ms -> 4.27ms [-0.95%, +1.94%]
• ✔️es_attr_filter: 2.93ms -> 2.9ms [-3.66%, +1.26%]
• ✔️graph_from_adjacency_matrix: 154ms -> 155ms [-0.59%, +2.44%]
• ✔️graph_from_data_frame: 4ms -> 3.98ms [-1.99%, +0.79%]
• ✔️vs_attr_filter: 1.67ms -> 1.68ms [-1.46%, +2.83%]
• ✔️vs_by_name: 1.1ms -> 1.11ms [-1.77%, +3.17%]
  Further explanation regarding interpretation and methodology can be found in the documentation.