[Umbrella] format the code in karmada-dashboard repo to meet golangci-lint

[chaosi-zju]

What would you like to be added:

format the code in karmada-dashboard repo to meet golangci-lint

Why is this needed:

• license check @chaosi-zju add static license check ci dashboard#176
• gofmt,goimports,gci @chaosi-zju format code about goimports and gci dashboard#178
• misspell,staticcheck,govet @chaosi-zju chore: format code about misspell,staticcheck,govet dashboard#181
• errcheck,gosimple,ineffassign,unused @chaosi-zju chore: format code about errcheck,gosimple,ineffassign,unused dashboard#188
• gocyclo,gosec @chaosi-zju chore: format code about gocyclo,gosec dashboard#189
• whitespace @warjiang chore: format code about whitespace dashboard#180
• revive
  • @chaosi-zju format code about exported function should have comment dashboard#179
  • @chaosi-zju chore: format code about exported function should have comment dashboard#183
  • @chaosi-zju chore: format code about revive dashboard#191
  • @chaosi-zju chore: format code about revive stuttering check dashboard#192

597 issues:
* errcheck: 6
* gci: 249
* gocyclo: 2
* gofmt: 4
* goimports: 14
* gosec: 4
* gosimple: 5
* govet: 1
* ineffassign: 5
* misspell: 2
* revive: 267
* staticcheck: 2
* unused: 8
* whitespace: 28

for revive lint (267):
  * blank-imports 2
  * empty-block 1
  * exported 150
  * indent-error-flow 2
  * receiver-naming 27
  * superfluous-else 1
  * unused-parameter 8
  * var-declaration 3
  * var-naming 14

[chaosi-zju]

@warjiang which would you like to pick

[chaosi-zju]

/help

[karmada-bot]

@chaosi-zju:
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In response to this:

/help

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[warjiang]

@warjiang which would you like to pick

I would like to pick whitespace for a try. After whitespace lint problems are resolved, I'll try more tasks~

[warjiang]

@chaosi-zju No permission to edit the issue,
for whitespace => karmada-io/dashboard#180

[RainbowMango]

Issue author manages issue.