community/py3-twine: add missing dependency

while it is true this should be provided by a module
(importlib.metadata) the name is not the same (importlib_metadata)
so code needs to be adapted and twine upstream still didn't get to it
7 jobs for !20371 with py3-twine in 1 minute and 17 seconds
detached
Status Job ID Name Coverage
  Lint
passed #369054
docker-alpine x86_64
lint

00:00:19

 
  Build
passed #369059
docker-alpine ci-build aarch64
build-aarch64

00:00:56

failed #369060
docker-alpine ci-build armv7
build-armv7

00:00:43

failed #369058
docker-alpine ci-build ppc64le
build-ppc64le

00:00:40

failed #369057
docker-alpine ci-build s390x
build-s390x

00:00:56

passed #369056
docker-alpine ci-build x86
build-x86

00:00:28

passed #369055
docker-alpine ci-build x86_64
build-x86_64

00:00:25

 
Name Stage Failure
failed
build-armv7 Build
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build-s390x Build
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build-ppc64le Build
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