Fix numeric strings parsed as datetime objects

[shemogumbe]

Overview

From my research, ms Graph works with datetime objects that conform to ISO 8601 format such as:

• "2024-09-10"
• "2024-09-10 12:34:56"
• "2024-08-18T05:26:14Z"
  These can be isolated using isdigit which is a string method as they contain characters such as -, /, : that are not string avlues

Related Issue

Fixes microsoftgraph/msgraph-sdk-python#881

Demo

Test values

test_values = [
    "2008-10-08T18:30:00.000000Z", "2008-10-08T18:30:00.000000", "20081008",
    "-PT15M", "1011317", "1150144"
]

Parsed VALUES

2008-10-08 18:30:00+00:00
2008-10-08 18:30:00+00:00
20081008
-PT15M
1011317
1150144

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[baywet]

Thank you for making the changes!