Update log message format

[timdengyun]

Based on golang Golang convention:
https://go.dev/wiki/CodeReviewComments#error-strings,
it should make the first letter of the log message sentence as upper case.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 40.52863% with 135 lines in your changes missing coverage. Please review.

Project coverage is 70.63%. Comparing base (1aee209) to head (811a32a).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/nsx/services/securitypolicy/firewall.go	13.51%	32 Missing ⚠️
cmd/main.go	0.00%	23 Missing ⚠️
pkg/nsx/cluster.go	40.90%	13 Missing ⚠️
pkg/nsx/util/utils.go	47.36%	10 Missing ⚠️
pkg/nsx/auth/jwt/vcclient.go	46.66%	8 Missing ⚠️
pkg/nsx/endpoint.go	72.72%	6 Missing ⚠️
pkg/nsx/services/securitypolicy/builder.go	0.00%	6 Missing ⚠️
pkg/controllers/securitypolicy/pod_handler.go	0.00%	4 Missing ⚠️
pkg/controllers/service/service_lb_controller.go	50.00%	4 Missing ⚠️
pkg/nsx/services/common/store.go	20.00%	4 Missing ⚠️
... and 13 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #866      +/-   ##
==========================================
+ Coverage   70.14%   70.63%   +0.49%     
==========================================
  Files          95       95              
  Lines       15104    15077      -27     
==========================================
+ Hits        10594    10649      +55     
+ Misses       3785     3704      -81     
+ Partials      725      724       -1     

Flag	Coverage Δ
unit-tests	70.63% <40.52%> (+0.49%)	⬆️

Files with missing lines	Coverage Δ
pkg/controllers/common/utils.go	77.67% <100.00%> (ø)
pkg/controllers/subnetset/subnetset_controller.go	80.20% <100.00%> (+0.20%)	⬆️
pkg/nsx/services/common/compare.go	100.00% <100.00%> (ø)
pkg/nsx/services/common/types.go	100.00% <ø> (ø)
pkg/nsx/services/subnet/builder.go	67.16% <ø> (-0.53%)	⬇️
pkg/nsx/transport.go	75.00% <100.00%> (ø)
pkg/nsx/util/license.go	100.00% <100.00%> (ø)
cmd_clean/main.go	0.00% <0.00%> (ø)
pkg/metrics/metrics.go	32.00% <0.00%> (ø)
pkg/nsx/auth/jwt/JWTtokenprovider.go	53.84% <0.00%> (ø)
... and 20 more

... and 3 files with indirect coverage changes

[zhengxiexie]

/e2e