py-poppler-qt5: fix build, add Python 3.11

[chrstphrchvz]

Fixes: https://trac.macports.org/ticket/68287

Description

Type(s)

• bugfix
• enhancement

Tested on

macOS 12.7
Xcode 14.2
Python 3.10.13, 3.11.6
configure.sdk_version=13.1

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL?
• checked your Portfile with port lint --nitpick?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?
• checked that the Portfile's most important variants haven't been broken?

[macportsbot]

Notifying maintainers:
@dliessi for port py-poppler-qt5.

[chrstphrchvz]

The CI failed because of e.g. Project ERROR: Could not resolve SDK Path for 'macosx12.3' using --show-sdk-path, which had been reported in https://trac.macports.org/ticket/65600 and encountered by various other qt5 ports. It is unrelated to the issue addressed by this PR.