ENH: Add reattach_fields function (#2480) #4382

Job	Run time
Check code style issues	35s
Build & verify package	12s
pytest on windows	4m 59s
pytest on 3.7 (crypto-lib: cryptography)	3m 38s
pytest on 3.8 (crypto-lib: cryptography)	3m 44s
pytest on 3.9 (crypto-lib: cryptography)	4m 21s
pytest on 3.10 (crypto-lib: cryptography)	3m 45s
pytest on 3.11 (crypto-lib: cryptography)	3m 21s
pytest on 3.12 (crypto-lib: cryptography)	4m 41s
pytest on 3.7 (crypto-lib: pycryptodome)	3m 27s
pytest on 3.7 (crypto-lib: none)	3m 53s
Combine & check coverage.	32s
	37m 8s

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