ports-mgmt/pkg: update to 2.3.0

Major changes

    improve reproducible build support
    scripts now support METALOG
    set(8): allow to bulk "partial replacement"
    rework the scheduler to minimize the number of split upgrades
    add(8): backout support for provides/requiress

Other changes

    update sqlite 3.50.4
    update curl 3.16.0
    fix fetch resuming
    shlib(8): now accept full patch
    stats(8): only show local db
    run pkg delete script even during split upgrades)
    back libraries during split upgrades if needed
    repositories: allow negative priorities
    upgrade: when pkg self restart: do not warn about the env vars.
    fetch(8): do not crash on invalid url
    many documentation fixes

PR:		289269
exp-run:	antoine