sysutils/debootstrap: Update to 1.0.128+nmu2+deb12u2

• This version fixes a problem where debootstrap would fail to install the previously removed usr-is-merged package on Trixie/Sid: E: Couldn't find these debs: usr-is-merged
• Depend on devel/pcre2 instead of devel/pcre:
  • devel/pcre doesn't support the E switch.
  • devel/pcre is EOLed by upstream.
• Fix "Failed to take /etc/passwd lock: Invalid argument" error.
• Pet portfmt.

PR: 289349
Approved by: nc@ (maintainer-timeout)