Replaced i_stream_read_data() calls with _read_bytes and _read_more()

src/lib-sieve-tool/mail-raw.c

src/lib-sieve/sieve-message.c

src/lib-sieve/util/program-client-remote.c

src/lib-sieve/util/program-client.c

src/managesieve-login/client-authenticate.c

src/plugins/doveadm-sieve/doveadm-sieve-sync.c

src/testsuite/cmd-test-message.c