chore(s3-deployment): explicitly pass --no-user to pip3 install (#8487

)

Otherwise, the build fails in some environments
(for example, Gitpod) with the error:

    ERROR: Can not combine '--user' and '--prefix' as they imply different installation locations

Fixes #8102

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-s3-deployment/lambda/build.sh

@@ -27,7 +27,7 @@ cd ${staging}
 # install python requirements
 # Must use --prefix to because --target cannot be used on
 # platforms that have a default --prefix set.
-pip3 install --ignore-installed --prefix ${piptemp} -r ${staging}/requirements.txt
+pip3 install --ignore-installed --prefix ${piptemp} --no-user -r ${staging}/requirements.txt
 mv ${piptemp}/lib/python*/*-packages/* .
 [ -d ${piptemp}/lib64 ] && mv ${piptemp}/lib64/python*/*-packages/* .
 rm -fr ./awscli/examples