Handle errors for API explorers when a provider not configured

I will be working on it.

This needs to be addressed for all the explorer types available.

I have added the fix similar to Chatgenerator Explorer to all the other explorers.

Tested for the below explorer and the console error is not thrown after applying the fix.

• Chatgenerator Explorer
• Embeddings Generation Explorer
• Image Classification Explorer
• Moderation Explorer
• Speech-To-Text Generation Explorer
• Text-To-Image Generation Explorer
• Text-To-Speech Generation Explorer
• Tools Explorer

Please test for the remaining explorers.

• Audio-To-Audio Explorer
• Image-and-Audio-to-Video Explorer
• Speech-To-Speech Explorer

Also please do a thorough code review and suggest if any changes are required.