Add SingleTenant/MSI Issuer to ValidTokenIssuers for Skill samples

[tracyboehrer]

See:
libraries/Microsoft.Bot.Builder.Dialogs.Adaptive.Runtime/Extensions/ServiceCollectionExtensions.AddBotRuntimeSkills

// For SingleTenant/MSI auth, the JWT tokens will be issued from the bot's home tenant.
// So, these issuers need to be added to the list of valid token issuers for authenticating activity requests.
validTokenIssuers.Add(string.Format(CultureInfo.InvariantCulture, AuthenticationConstants.ValidTokenIssuerUrlTemplateV1, tenantId));
validTokenIssuers.Add(string.Format(CultureInfo.InvariantCulture, AuthenticationConstants.ValidTokenIssuerUrlTemplateV2, tenantId));
validTokenIssuers.Add(string.Format(CultureInfo.InvariantCulture, AuthenticationConstants.ValidGovernmentTokenIssuerUrlTemplateV1, tenantId));
validTokenIssuers.Add(string.Format(CultureInfo.InvariantCulture, AuthenticationConstants.ValidGovernmentTokenIssuerUrlTemplateV2, tenantId));

This is obscure. Research whether this could be added to ConfigurationBotFrameworkAuthentication or ConfigurationServiceClientCredentialFactory. Such that this would be automatic. This would impact the Adaptive Runtime, which would need to change too.

Would need to happen in JS too.