builder: castless noop in `ptr_offset_strided`. #643

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	8m 23s
Difftest (macOS-latest)	7m 21s
Test (windows-2022)	15m 14s
Test (ubuntu-24.04)	8m 14s
Test (macOS-latest)	6m 49s
Compiletest (ubuntu-24.04)	9m 28s
Compiletest (macOS-latest)	7m 30s
Difftest (ubuntu-24.04)	10m 17s
Difftest (windows-2022)	18m 55s
Lint	6m 28s
Compiletest (windows-2022)	15m 19s
cargo-deny	1m 18s
test_success	3s
	1h 55m 19s

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