[backport 2.3.x] BUG(string dtype): groupby/resampler.min/max returns float on all NA strings (#60985) #23840
| Job | Run time |
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| 22m 17s | |
| 32m 25s | |
| 49m 43s | |
| 1h 31m 20s | |
| 1h 31m 0s | |
| 23m 42s | |
| 1h 3m 9s | |
| 1h 12m 22s | |
| 1h 30m 18s | |
| 22m 1s | |
| 1h 12m 1s | |
| 28m 45s | |
| 54m 15s | |
| 9m 1s | |
| 29m 1s | |
| 25m 49s | |
| 1h 21m 56s | |
| 1h 30m 34s | |
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| 1h 24m 25s | |
| 1h 19m 14s | |
| 1h 10m 54s | |
| 34m 49s | |
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| 26m 14s | |
| 1h 22m 58s | |
| 7m 10s | |
| 1h 30m 33s | |
| 1h 12m 35s | |
| 1h 20m 46s | |
| 1h 4m 54s | |
| 1h 19m 17s | |
| 1h 18m 20s | |
| 1h 22m 33s | |
| 1d 10h 41m 26s |