Update `GraphEdge` visualizer to use sliced struct fields #15696

Job	Run time
paths-filter	5s
Checks / Lint markdown	22s
Checks / Rerun lints	43s
Checks / Misc formatting	14s
Checks / Check if running codegen would produce any changes	1m 7s
Checks / Spell Check	8s
Checks / markdown-paths-filter	4s
C++ tests	0s
Python Checks	0s
Deploy Landing Preview	0s
Minimum CLI Build / Set Config (linux-x64)	4s
Rust Checks / Test on ${{ matrix.name }}	0s
Rust Checks / Rust lints (fmt, check, clippy, tests, doc)	4m 40s
Build rerun_js / Build rerun_js	3m 5s
Build web viewer / Build web viewer	2m 54s
Checks / Check links	0s
Minimum CLI Build / Build rerun-cli (ubuntu-latest-16-cores)	4m 50s
Upload Web / Upload web build to google cloud (wasm32 + wasm-bindgen)	13s
Minimum Wheel Build	0s
Minimum Wheel Test	0s
	18m 29s

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