lib-sieve: sieve-storage - Rework error field/return parameter initialization

src/lib-sieve/sieve-binary-file.c

src/lib-sieve/sieve-common.h

src/lib-sieve/sieve-script.c

src/lib-sieve/sieve-storage.c

src/lib-sieve/sieve.c

src/lib-sieve/storage/file/sieve-file-storage-active.c

src/lib-sieve/storage/file/sieve-file-storage.c