"System.Net.CookieContainer" throws an "ArgumentException" error when using a non-UTF-8 machine locale and hostname

How to reproduce:
1. Make sure to switch the system locale to one that does not conform to [Internal link] like “Japanese (Japan)”
2. Make sure that the hostname contains multi-byte characters like “あいうえお”
3. Open the “illegal-argument-exception“ project
4. Open the “SampleScene”
5. Observe the Console

Expected result: No errors are thrown
Actual result: The “ArgumentException: Illegal byte sequence encounted in the input.” error is thrown

Reproduced with: 2021.3.37f1, 2022.3.26f1, 2023.2.19f1, 6000.0.0b16

Reproduced on: Windows 10 (by reporter), Windows 11
Not reproduced on: No other environment tested

Notes:
1. Full error is provided in the internal comments
2. Detailed instructions on how to switch locale and hostname are provided in the internal comments