bench: refactor to use use dynamic memory allocation in stats/strided/dmeankbn2
#20358
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stats/strided/dmeankbn2
#20358
| Job | Run time |
|---|---|
| 0s | |
| 0s | |
| -1s | |
| -6s | |
| -6s | |
| -9s | |
| -10s | |
| -32s |