[Backport 2.x] Add DerivedFieldMapper and support parsing it in mappings (#12569) #26541
| Job | Run time |
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| 21m 22s | |
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| 11m 42s | |
| 18m 1s | |
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| 11m 27s | |
| 17m 8s | |
| 33m 57s | |
| 2h 40m 0s |
| Job | Run time |
|---|---|
| 12m 7s | |
| 21m 22s | |
| 19m 10s | |
| 11m 42s | |
| 18m 1s | |
| 15m 6s | |
| 11m 27s | |
| 17m 8s | |
| 33m 57s | |
| 2h 40m 0s |