Fix lint issues

[blampe]

Lint fixes in preparation of pulumi/ci-mgmt#2024.

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 58 lines in your changes missing coverage. Please review.
✅ Project coverage is 28.78%. Comparing base (544de74) to head (b4d95e9).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
provider/pkg/provider/remote/proxyConnection.go	0.00%	16 Missing ⚠️
provider/pkg/provider/common/inputs.go	0.00%	10 Missing ⚠️
provider/pkg/provider/remote/commandOutputs.go	0.00%	6 Missing ⚠️
provider/pkg/provider/remote/connection.go	78.57%	6 Missing ⚠️
provider/pkg/provider/remote/copyController.go	16.66%	5 Missing ⚠️
provider/pkg/provider/local/base.go	0.00%	4 Missing ⚠️
provider/pkg/provider/local/commandOutputs.go	0.00%	2 Missing ⚠️
provider/pkg/provider/provider.go	0.00%	2 Missing ⚠️
provider/pkg/provider/remote/commandController.go	60.00%	1 Missing and 1 partial ⚠️
...ider/pkg/provider/util/testutil/test_ssh_server.go	0.00%	2 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1133      +/-   ##
==========================================
+ Coverage   28.36%   28.78%   +0.41%     
==========================================
  Files          25       25              
  Lines         846      879      +33     
==========================================
+ Hits          240      253      +13     
- Misses        557      577      +20     
  Partials       49       49              

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