Fix a bug where DetailedLoggingListener does not print text request body

[seratch]

This pull request fixes a bug on DetailedLoggingListener behavior. If I remember correctly, the logging listener used to work properly with older versions of okhttp but not it sometimes does not work. This pull request refactors the internals to make it function again. This PR does not bring any breaking changes to existing public classes / interfaces. Thus, we can ship it in the next patch version.

Category (place an x in each of the [ ])

• bolt (Bolt for Java)
• bolt-{sub modules} (Bolt for Java - optional modules)
• slack-api-client (Slack API Clients)
• slack-api-model (Slack API Data Models)
• slack-api-*-kotlin-extension (Kotlin Extensions for Slack API Clients)
• slack-app-backend (The primitive layer of Bolt for Java)

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to the those rules.

[codecov]

Codecov Report

Merging #999 (22f49c6) into main (ec509ad) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main     #999      +/-   ##
============================================
+ Coverage     76.70%   76.79%   +0.08%     
- Complexity     3677     3684       +7     
============================================
  Files           403      403              
  Lines         11102    11103       +1     
  Branches       1109     1106       -3     
============================================
+ Hits           8516     8526      +10     
+ Misses         1909     1905       -4     
+ Partials        677      672       -5     

Impacted Files	Coverage Δ
.../com/slack/api/methods/impl/MethodsClientImpl.java	85.07% <100.00%> (+0.01%)	⬆️
.../java/com/slack/api/util/http/SlackHttpClient.java	86.95% <100.00%> (+0.19%)	⬆️
...pi/util/http/listener/DetailedLoggingListener.java	79.59% <100.00%> (+7.36%)	⬆️
...k/api/util/http/listener/HttpResponseListener.java	100.00% <100.00%> (ø)
...java/com/slack/api/methods/RequestFormBuilder.java	88.25% <0.00%> (+<0.01%)	⬆️
...va/com/slack/api/socket_mode/SocketModeClient.java	68.15% <0.00%> (+0.63%)	⬆️
...imits/metrics/impl/BaseMemoryMetricsDatastore.java	80.08% <0.00%> (+1.29%)	⬆️

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