Disable logging full payload with access token after errors

[PoCTo]

• Pyrollbar appends access_token to payload in several places: _build_payload, _get_api
• In cases where the endpoint returns error 429 or error 413, the payload is logged in full, including access_token field (Rollbar: over rate limit, data was dropped. Payload was: '{"access_token": "...", "data": ...})
• this behavior cannot be configured. In case of error 429 one may set SETTINGS['log_all_rate_limited_items'], but the rate limit error will still be called at least once.
• In end effect the access token may become exposed in rollbar logs. This is a security issue.

Solutions I see

1. Since it is only access_token variable that is added to the data, directly replace it params_sanitized = params.replace(access_token if access_token else SETTINGS['access_token'], '***')
2. Scrub the payload in _parse_response the same way the underlying log is scrubbed
3. Add log_payload_on_error setting that would control this behavior

Happy to fix this myself. What's the best way to go about this?

[linear]

SDK-562