Added read only permissions to duo-client

[sfazilud]

Description

Added new Admin API permission parameters to the create_integration and update_integration methods in the Python client:

• adminapi_admins_read — read-only admins permission
• adminapi_integrations_read — read-only integrations permission
• adminapi_settings_read — read-only settings permission
• adminapi_allow_to_set_permissions — permission to set permissions (create only)

These were added to:

• Function signatures
• Docstrings
• Request body serialization (bool → "1"/"0")
• Integration object format documentation

Motivation and Context

The upstream third-party repo (trustedpath/third-party/duo_client_python) introduced additional granular read-only permission flags for Admin API integrations. This change brings the open-source duo_client_python client in sync with those additions, allowing consumers to configure fine-grained read permissions when creating or updating integrations.

How Has This Been Tested?

Added 4 new unit tests in tests/admin/test_integration.py:

• test_create_integration_with_permissions — verifies all permission params serialize as "1" when True
• test_create_integration_with_permissions_disabled — verifies new permission params serialize as "0" when False
• test_update_integration_with_permissions — verifies all permission params on update serialize as "1"
• test_update_integration_with_permissions_disabled — verifies new permission params on update serialize as "0"

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)