databases/sqlite3: Fix soname, fix build if ICU=on LIBEDIT=off and READLINE=off

--soname=libsqlite3.so.${DISTVERSION} mean that users must
rebuild/reinstall all consumers of the sqlite3 after each patch-level
update.
Use --soname=legacy => soname = libsqlite3.so.0 - ABI and API didn't
changed.

PR: 287983
Approved by: Pavel Volkov <pavelivolkov@gmail.com> (maintainer, implicit - fix runtime)
Fixes: 8af3fe5ef31b (update to 3.50.2)
Co-authored-by: russian@russerver.org

(cherry picked from commit 25ef3857b80f0bda031c638303ff49369e2501ac)