Add boto3 requirements file (#778)

This requirements file contains a pathological case where we have to
step through all the versions. I'm putting it in git to make it easier
to collaborate on it.

scripts/requirements/boto3.in

@@ -0,0 +1,16 @@
+# Works with python 3.12
+boto3>0.0.19
+urllib3
+botocore
+setuptools
+s3transfer
+wheel
+packaging
+idna
+pyyaml
+python-dateutil
+grpcio-status
+cryptography
+google-api-core
+pip
+numpy