API: Support Bearer authentication.

[winlinvip]

GitHub API:

curl --request GET \
--url "https://api.github.com/repos/octocat/Spoon-Knife/issues" \
--header "Accept: application/vnd.github+json" \
--header "Authorization: Bearer YOUR-TOKEN"

OpenAI API:

curl http://${OPENAI_PROXY}/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -d '{
    "model": "gpt-3.5-turbo",
    "messages": [{"role": "user", "content": "Hello, how are you?"}]
  }'

SRS Cloud should support simple Bearer token.

[winlinvip]

HTTP OpenAPI changed to Bearer authentication. 5.8+