Add Support for Client ID and Client Secret in Symbol Uploads

[bobbyg603]

Our Unity and Unreal engine integrations need this functionality.

On other platforms, we support both user credentials, as well as OAuth2 Client Credentials AKA database specific Client ID and Client Secret.

An example of how to upload symbols for a version using Client ID and Client Secret is available in the bugsplat-js-api-client repo.

OAuthClientCredentials API

• Login
• Fetch

Versions API

• PostSymbols

[bobbyg603]

Perhaps we might move away from the shell script, develop this code in swift, and distribute a binary?

We could also potentially create a standalone dotnet 6/7 binary which we could write in C# and would be cross platform.