Remove a switch in the cell vertex shader #8859

Job	Run time
macOS Brew	2m 58s
macOS Brew	2m 58s
Linux (python=3.9 cc=gcc sanitize=0)	1m 16s
Linux (python=3.9 cc=gcc sanitize=0)	1m 16s
Bundle test (ubuntu-latest)	2m 5s
Bundle test (ubuntu-latest)	2m 5s
Test ./dev.sh and benchmark	1m 45s
Test ./dev.sh and benchmark	1m 45s
Linux (python=3.10 cc=gcc sanitize=1)	1m 35s
Linux (python=3.10 cc=gcc sanitize=1)	1m 35s
Bundle test (macos-latest)	3m 5s
Bundle test (macos-latest)	2m 10s
Linux package	11m 2s
Linux package	11m 2s
Linux (python=3.11 cc=clang sanitize=1)	2m 11s
Linux (python=3.11 cc=clang sanitize=1)	2m 11s
	50m 59s

Provide feedback