build: add poetry-plugin-export to the dependencies #4609

Job	Run time
build-container-image	32s
Download and cache Tesseract data	10s
run-lint	40s
windows	7m 2s
macOS (arch64)	3m 34s
macOS (x86_64)	5m 17s
build-install-rpm (fedora 40)	6m 12s
build-deb (ubuntu 20.04)	1m 35s
run tests (ubuntu 20.04)	6m 44s
build-install-rpm (fedora 41)	6m 7s
build-deb (ubuntu 22.04)	1m 27s
run tests (ubuntu 22.04)	7m 0s
build-deb (ubuntu 24.04)	1m 20s
run tests (ubuntu 24.04)	6m 29s
build-deb (ubuntu 24.10)	1m 24s
run tests (ubuntu 24.10)	5m 53s
build-deb (debian bullseye)	1m 24s
run tests (debian bullseye)	7m 26s
run tests (debian bookworm)	6m 35s
build-deb (debian bookworm)	1m 26s
build-deb (debian trixie)	1m 26s
run tests (debian trixie)	6m 31s
run tests (fedora 40)	6m 39s
run tests (fedora 41)	6m 48s
install-deb (${{ matrix.distro }} ${{ matrix.version }})	0s
	1h 39m 41s

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