[chore] golangci enable gofumpt

[akhileshsingh85]

Description: golangci enable gofumpt check

Testing: make lint-all

[codecov]

Codecov Report

❌ Patch coverage is 38.36478% with 98 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.00%. Comparing base (2c59550) to head (6fb214a).

Files with missing lines	Patch %	Lines
...nal/signalfx-agent/pkg/monitors/conviva/conviva.go	0.00%	8 Missing ⚠️
...agent/pkg/monitors/cadvisor/converter/converter.go	0.00%	7 Missing ⚠️
internal/signalfx-agent/pkg/monitors/http/http.go	12.50%	7 Missing ⚠️
...pkg/monitors/mongodb/atlas/measurements/process.go	0.00%	6 Missing ⚠️
...gnalfx-agent/pkg/monitors/mongodb/atlas/monitor.go	0.00%	6 Missing ⚠️
...ernal/signalfx-agent/pkg/monitors/expvar/expvar.go	0.00%	5 Missing ⚠️
...t/pkg/monitors/mongodb/atlas/measurements/disks.go	0.00%	5 Missing ⚠️
cmd/discoverybundler/main.go	0.00%	4 Missing ⚠️
...ernal/signalfx-agent/pkg/monitors/nagios/nagios.go	0.00%	4 Missing ⚠️
internal/signalfx-agent/pkg/monitors/cpu/cpu.go	0.00%	3 Missing ⚠️
... and 30 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6892      +/-   ##
==========================================
+ Coverage   37.93%   38.00%   +0.07%     
==========================================
  Files         367      367              
  Lines       25743    25703      -40     
==========================================
+ Hits         9765     9769       +4     
+ Misses      15165    15122      -43     
+ Partials      813      812       -1     

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