all: add golangci

[vangent]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 55.67010% with 43 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.73%. Comparing base (5bbf1c0) to head (b4fb700).

Files with missing lines	Patch %	Lines
blob/fileblob/fileblob.go	37.50%	4 Missing and 1 partial ⚠️
aws/rds/rds.go	0.00%	4 Missing ⚠️
azure/azuredb/azuredb.go	0.00%	4 Missing ⚠️
blob/azureblob/azureblob.go	0.00%	4 Missing ⚠️
blob/drivertest/bindata.go	0.00%	1 Missing and 2 partials ⚠️
blob/fileblob/attrs.go	0.00%	3 Missing ⚠️
docstore/drivertest/driverbenchmark.go	0.00%	3 Missing ⚠️
docstore/mongodocstore/urls.go	0.00%	3 Missing ⚠️
blob/s3blob/s3blob.go	50.00%	1 Missing and 1 partial ⚠️
docstore/gcpfirestore/fs.go	33.33%	1 Missing and 1 partial ⚠️
... and 7 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3741      +/-   ##
==========================================
+ Coverage   68.70%   74.73%   +6.03%     
==========================================
  Files         130      107      -23     
  Lines       20500    14323    -6177     
==========================================
- Hits        14084    10705    -3379     
+ Misses       4969     2882    -2087     
+ Partials     1447      736     -711     

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