Add ability to configure file permissions of written files (closes #183) #410

Job	Run time
cache-deps (linux)	15s
build-images	1m 5s
unit-test (ubuntu-22.04)	37s
build (linux)	39s
unit-test (macos-latest)	43s
lint (linux)	51s
Build matrix	3s
integration-tests (change-entry-test.sh)	3m 52s
integration-tests (restore-entry-test.sh)	3m 22s
integration-tests (run-go-test.sh)	2m 7s
integration-tests (run-mysql-test.sh)	1m 47s
integration-tests (run-postgres-test.sh)	2m 1s
	17m 22s

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