[FFM-8148] - Standardise SDK error codes

[andybharness]

FFM-8148 - Standardise SDK error codes

What
Adding standardised SDK error codes + pushing some logs down to debug to reduce noise

Why
Each SDK uses different log messages for its lifecycle. We want to standardise messages across SDKs with a unique code.

Testing
Manual testing + unit testing

[codecov-commenter]

Codecov Report

Patch coverage: 80.26% and project coverage change: +0.28% 🎉

Comparison is base (14d3516) 60.98% compared to head (c9a2e25) 61.27%.

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Additional details and impacted files

@@             Coverage Diff              @@
##               main     #158      +/-   ##
============================================
+ Coverage     60.98%   61.27%   +0.28%     
- Complexity      364      385      +21     
============================================
  Files            31       32       +1     
  Lines          1779     1836      +57     
  Branches        202      211       +9     
============================================
+ Hits           1085     1125      +40     
- Misses          541      550       +9     
- Partials        153      161       +8     

Files Changed	Coverage Δ
...io/harness/cf/client/connector/LocalConnector.java	0.00% <0.00%> (ø)
...va/io/harness/cf/client/connector/EventSource.java	70.83% <66.66%> (+0.20%)	⬆️
...ain/java/io/harness/cf/client/common/SdkCodes.java	73.33% <73.33%> (ø)
...ava/io/harness/cf/client/api/MetricsProcessor.java	79.19% <75.00%> (-1.22%)	⬇️
...ain/java/io/harness/cf/client/api/AuthService.java	77.77% <100.00%> (+0.85%)	⬆️
.../main/java/io/harness/cf/client/api/Evaluator.java	85.60% <100.00%> (+0.59%)	⬆️
...ain/java/io/harness/cf/client/api/InnerClient.java	70.23% <100.00%> (-1.66%)	⬇️
...ava/io/harness/cf/client/api/PollingProcessor.java	81.69% <100.00%> (ø)
.../harness/cf/client/connector/HarnessConnector.java	69.95% <100.00%> (+0.12%)	⬆️

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