Make createFolder and deleteFolder retry able

[Tulsishah]

Description

We've recently observed some failures in our end-to-end tests when calling the CreateFolder API. The error message reads:

"MkDir: input/output error, CreateChildDir: rpc error: code = Internal desc = We encountered an internal error. Please try again." 

In this, we initially made this error non-retryable because the go-sdk wasn't retrying it. However, we're reverting that change because we're encountering this error frequently in GCSFuse, necessitating a retry mechanism on our end.

Link to the issue in case of a bug fix.

NA

Testing details

1. Manual - Already_Exist error code returned when retrying to Create already created folder and Not_found for deleting folder which is already deleted, these error codes are not part of retry.
2. Unit tests - NA
3. Integration tests - Automated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.30%. Comparing base (4380816) to head (648c5d2).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2565      +/-   ##
==========================================
- Coverage   78.36%   78.30%   -0.07%     
==========================================
  Files         107      107              
  Lines       11751    11795      +44     
==========================================
+ Hits         9209     9236      +27     
- Misses       2062     2070       +8     
- Partials      480      489       +9     

Flag	Coverage Δ
unittests	78.30% <100.00%> (-0.07%)	⬇️

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