feat: add saveAll and deleteAll transactional operations #412

Job	Run time
NestJS Example App Validation (ubuntu-latest, 18.x)	1m 4s
NestJS Example App Validation (ubuntu-latest, 18.x)	1m 2s
NestJS Example App Validation (ubuntu-latest, 18.x)	1m 2s
Library Validation (ubuntu-latest, 18.x)	44s
Library Validation (ubuntu-latest, 18.x)	47s
Library Validation (ubuntu-latest, 18.x)	47s
NestJS Example App Validation (ubuntu-latest, 20.x)	1m 0s
NestJS Example App Validation (ubuntu-latest, 20.x)	1m 3s
NestJS Example App Validation (ubuntu-latest, 20.x)	1m 3s
Library Validation (ubuntu-latest, 20.x)	41s
Library Validation (ubuntu-latest, 20.x)	41s
Library Validation (ubuntu-latest, 20.x)	41s
NestJS Example App Validation (windows-latest, 18.x)	1m 10s
NestJS Example App Validation (windows-latest, 18.x)	3m 36s
NestJS Example App Validation (windows-latest, 18.x)	3m 36s
Library Validation (windows-latest, 18.x)	2m 28s
Library Validation (windows-latest, 18.x)	3m 7s
Library Validation (windows-latest, 18.x)	3m 7s
NestJS Example App Validation (windows-latest, 20.x)	1m 9s
NestJS Example App Validation (windows-latest, 20.x)	3m 35s
NestJS Example App Validation (windows-latest, 20.x)	3m 11s
Library Validation (windows-latest, 20.x)	2m 30s
Library Validation (windows-latest, 20.x)	2m 34s
Library Validation (windows-latest, 20.x)	2m 34s
	43m 12s

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