[GB18030] Fail to add a new setting named with GB18030 language for the Linux web app

[v-chenzha]

trafficstars

OS: Win10 Azure App Service Version: v0.24.9 GB18030: All

Repro Steps:

1. Create a new Linux web app.
2. Expand the web app -> Right click the "Application Settings" node -> Click "Add New Setting..."-> Enter the name with GB18030 language.
3. Check the result.

Expect: Succeed to add a new setting without any error.

Actual: Fail to add a new setting.

More Info: This issue doesn't reproduce for Windows web App.

[v-ruizh]

This issue also reproduces for Static Web App and Linux Function App.