py-eic-rucio-policy-package: new package

[wdconinc]

Briefly, what does this PR introduce?

New package for py-eic-rucio-policy-package.

12:31:15 wdconinc@menelaos ~/git $ spack load py-eic-rucio-policy-package
12:32:15 wdconinc@menelaos ~/git $ python
Python 3.11.9 (main, Nov 27 2024, 02:41:10) [GCC 14.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from eic_rucio_policy_package import schema
>>> schema.ACCOUNTS
{'description': 'Array of accounts', 'type': 'array', 'items': {'description': 'Account name', 'type': 'string', 'maxLength': 25, 'pattern': '^[a-zA-Z0-9-_]+$'}, 'minItems': 0, 'maxItems': 1000}
>>> 
12:33:06 wdconinc@menelaos ~/git $ spack edit py-eic-rucio-policy-package