Add more helpful information in web-api debug logging

[seratch]

As mentioned at https://github.com/slackapi/bolt-js/issues/1550 , debugging the web-api client ca be hard as its debug-level does not provide sufficient information.

When your app performs an apps.connections.open API call, the only information you can receive is blow:

[DEBUG]  web-api:WebClient:1 apiCall('apps.connections.open') start
[DEBUG]  web-api:WebClient:1 will perform http request
[DEBUG]  web-api:WebClient:1 http response received

Like Python and Java SDKs already do, we can add more meaningful information to the debug-level logging. One thing that we should be careful would be redact token data from the logging content. Refer to the following existing code for more details:

• https://github.com/slackapi/python-slack-sdk/blob/v3.18.1/slack_sdk/web/base_client.py#L244-L259
• https://github.com/slackapi/java-slack-sdk/blob/v1.24.0/slack-api-client/src/main/java/com/slack/api/util/http/listener/DetailedLoggingListener.java#L27-L36
• https://github.com/slackapi/java-slack-sdk/blob/v1.24.0/slack-api-client/src/main/java/com/slack/api/util/http/listener/DetailedLoggingListener.java#L54-L59
• https://github.com/slackapi/java-slack-sdk/blob/v1.24.0/slack-api-client/src/main/java/com/slack/api/util/http/listener/DetailedLoggingListener.java#L75-L80

Packages:

Select all that apply:

• [x] @slack/web-api
• [ ] @slack/rtm-api
• [ ] @slack/webhooks
• [ ] @slack/oauth
• [ ] @slack/socket-mode
• [ ] @slack/types
• [ ] I don't know

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