shuf: handle default RNG init failures gracefully #11162

Performance Regression: -3.38%

❌ 1 regressed benchmark
✅ 293 untouched benchmarks
⏩ 42 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
❌	Simulation	`shuf_input_range[1000000]`	84.2 ms	87.1 ms	-3.38%

_{Comparing jorgitin02:fix/11152-strace-e-inject-getrandom-error-eaga (4e0ee46) with main (ba94c69)}

42 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩