Add `FieldInfo::field_type_name` #2209

Job	Run time
minimal	10s
docs	19s
check-cfg	19s
msrv	52s
quickchecking	14s
rustfmt-clippy	26s
test-book	6s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	1m 46s
test-expectations (ubuntu-latest)	53s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	1m 49s
test-expectations (macos-12)	1m 3s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	1m 44s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	1m 46s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	2m 26s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	2m 19s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	2m 54s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	2m 12s
test (ubuntu-latest, 16.0, 1, 0, 0, 0, 0)	2m 40s
test (ubuntu-latest, 16.0, 1, 0, 0, 1, 0)	2m 28s
test (ubuntu-latest, 16.0, 1, 0, 1, 0, 0)	2m 34s
test (ubuntu-latest, 16.0, 1, 0, 1, 1, 0)	2m 34s
test (ubuntu-latest, 16.0, 1, 1, 0, 0, 0)	2m 59s
test (ubuntu-latest, 16.0, 1, 1, 0, 1, 0)	3m 9s
test (ubuntu-latest, 16.0, 1, 1, 1, 0, 0)	2m 58s
test (ubuntu-latest, 16.0, 1, 1, 1, 1, 0)	3m 4s
test (ubuntu-latest, 16.0, 0, 0, 1)	1m 53s
test (macos-12, 9.0, 0, 0, 0)	1m 52s
success	1s
	47m 30s

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