feat: remove useless g2p module artifacts

- Remove 17 g2p modules that only contained i18n/.pot files
- These were translation artifacts from scripts when modules exist in other repos
- Actual g2p modules are maintained in separate g2p-modules repository
- Also remove unused GitHub workflow files

Cleaned up modules:
- g2p_bank, g2p_bank_rest_api
- g2p_encryption, g2p_encryption_keymanager, g2p_encryption_rest_api
- g2p_entitlement_cash, g2p_enumerator
- g2p_openid_vci, g2p_openid_vci_rest_api
- g2p_programs, g2p_registry_base, g2p_registry_documents
- g2p_registry_encryption, g2p_registry_group, g2p_registry_individual
- g2p_registry_membership, g2p_registry_rest_api

This reduces repository clutter and eliminates confusion about which
modules are actually maintained in this repository.

Author: jeremi