Replace deprecated oauth2client with google-auth and unpin pyopenssl

[Copilot]

This PR modernizes Google Cloud Platform authentication by replacing the deprecated oauth2client library with the officially recommended google-auth library, and removes the pyopenssl version pin that was causing compatibility issues.

🔧 Changes Made

Dependencies (pyproject.toml)

• Removed: oauth2client (deprecated and causing pyopenssl conflicts)
• Added: google-auth (modern Google authentication library)
• Unpinned: pyopenssl (was pinned to ==24.2.1, now allows latest compatible version)

Authentication Implementation (wrapanapi/systems/google.py)

• Updated imports: oauth2client.service_account.ServiceAccountCredentials → google.oauth2.service_account.Credentials
• Replaced ServiceAccountCredentials.from_json_keyfile_dict() with Credentials.from_service_account_info()
• Replaced ServiceAccountCredentials.from_json_keyfile_name() with Credentials.from_service_account_file()
• Updated Google API client initialization to use modern credentials parameter
• Deprecated P12 format with helpful migration guidance

✅ Backward Compatibility

All existing authentication methods continue to work:

# Service account dictionary (recommended) - unchanged
gcp = GoogleCloudSystem(
    project="my-project",
    zone="us-central1-a", 
    service_account=service_account_dict
)

# JSON file authentication - unchanged
gcp = GoogleCloudSystem(
    project="my-project",
    zone="us-central1-a",
    file_type="json",
    file_path="/path/to/service-account.json"
)

🚫 Breaking Change

P12 keyfile format is no longer supported and will raise NotImplementedError with clear migration instructions. Users should generate new JSON service account keys from the Google Cloud Console or using gcloud CLI.

🎯 Benefits

• Security: Uses actively maintained authentication library
• Compatibility: Removes pyopenssl version conflicts that were blocking updates
• Future-proof: Adopts Google's recommended authentication approach
• Performance: Better token handling and caching

🧪 Testing

• Comprehensive validation of syntax, imports, and authentication logic
• API compatibility verification
• Error handling validation
• All existing public methods and parameters preserved

Fixes #509.

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[ogajduse]

Switching to ready state as I successfully tested the patch using the below script:

from wrapanapi.systems.google import GoogleCloudSystem

gceclient = GoogleCloudSystem(
       project="macgyver-project",
       zone='us-east1-b',
       file_path='secrets/gce_cert',
       file_type='json',
)

gceclient.list_network()

# Out: ['default', 'test-network']

[lpramuk]

So we can remove this completely , right ?

[Copilot]

Yes, you're correct. The pyopenssl dependency has been completely removed as it's no longer needed with the google-auth library. Fixed in commit 2653dac.

[lpramuk]

Don't be explicit about pyopenssl dependency and remove it

[ogajduse]

Don't be explicit about pyopenssl dependency and remove it

@copilot can you please take a look at this?

[Copilot]

Don't be explicit about pyopenssl dependency and remove it

@copilot can you please take a look at this?

Done! Removed the explicit pyopenssl dependency completely from pyproject.toml. The google-auth library handles its own cryptographic dependencies, so pyopenssl is no longer needed. Fixed in commit 2653dac.

[lpramuk]

Now I like it