feat: add HTTP status code to detail message of InfluxException, add GatewayTimeoutException for 504

[bednar]

Proposed Changes

1. Added HTTP status code to detail message of the InfluxException => logged exception looks like: HTTP status code: 501; Message: Wrong query"
2. Added GatewayTimeoutException for HTTP status code 504

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• mvn test completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #367 (5ad3e97) into master (65d0398) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master     #367   +/-   ##
=========================================
  Coverage     88.99%   89.00%           
  Complexity      635      635           
=========================================
  Files           155      156    +1     
  Lines          6344     6348    +4     
  Branches        303      303           
=========================================
+ Hits           5646     5650    +4     
  Misses          612      612           
  Partials         86       86           

Impacted Files	Coverage Δ
...m/influxdb/client/internal/InfluxDBClientImpl.java	89.47% <ø> (ø)
...m/influxdb/exceptions/GatewayTimeoutException.java	100.00% <100.00%> (ø)
.../java/com/influxdb/exceptions/InfluxException.java	96.49% <100.00%> (+0.06%)	⬆️
...java/com/influxdb/internal/AbstractRestClient.java	73.77% <100.00%> (+0.43%)	⬆️

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