lib-sieve: sieve - Use int for sieve_compile_script() status result

src/lib-sieve/sieve.c

src/lib-sieve/sieve.h

src/managesieve/cmd-putscript.c

src/managesieve/cmd-setactive.c

src/plugins/doveadm-sieve/doveadm-sieve-cmd-activate.c

src/plugins/doveadm-sieve/doveadm-sieve-cmd-put.c

src/plugins/imap-filter-sieve/imap-filter-sieve.c

src/plugins/imapsieve/imap-sieve.c

src/plugins/lda-sieve/lda-sieve-plugin.c