fix: set formatter for klog logger

[chetan-rns]

We set the logger for klog and the client-go library uses it. This fix sets the formatter for the logger so that the logs from klog stay consistent with the log format set by the user.

Before:

Logs from client-go don't follow the right format

cbanavik@cbanavik-mac argo-rollouts % go run cmd/rollouts-controller/main.go --logformat="json"

{"level":"info","msg":"Argo Rollouts starting","time":"2024-04-02T13:16:31+05:30","version":
{"level":"info","msg":"Leaderelection get id cbanavik-mac_11377322-2859-434d-8f46-121b1438e6b2","time":"2024-04-02T13:16:31+05:30"}
{"level":"info","msg":"Starting Metric Server at 0.0.0.0:8090","time":"2024-04-02T13:16:31+05:30"}
INFO[0000] attempting to acquire leader lease argo-rollouts/argo-rollouts-controller-lock... 
{"level":"info","msg":"New leader elected: cbanavik-mac_0b485ea3-1a2b-4418-8be8-6b572a7c168f","time":"2024-04-02T13:16:31+05:30"}
{"level":"info","msg":"New leader elected: cbanavik-mac_11377322-2859-434d-8f46-121b1438e6b2","time":"2024-04-02T13:16:49+05:30"}
INFO[0017] successfully acquired lease argo-rollouts/argo-rollouts-controller-lock 

After:

cbanavik@cbanavik-mac argo-rollouts % go run cmd/rollouts-controller/main.go --logformat="json"

{"level":"info","msg":"Argo Rollouts starting","time":"2024-04-02T13:09:20+05:30","version":
{"level":"info","msg":"Leaderelection get id cbanavik-mac_0b485ea3-1a2b-4418-8be8-6b572a7c168f","time":"2024-04-02T13:09:20+05:30"}
{"level":"info","msg":"attempting to acquire leader lease argo-rollouts/argo-rollouts-controller-lock...\n","time":"2024-04-02T13:09:20+05:30"}
{"level":"info","msg":"Starting Metric Server at 0.0.0.0:8090","time":"2024-04-02T13:09:20+05:30"}
{"level":"info","msg":"New leader elected: cbanavik-mac_24066bb3-0dcf-4115-bfbc-af7c6ee68fa5","time":"2024-04-02T13:09:20+05:30"}
{"level":"info","msg":"New leader elected: cbanavik-mac_0b485ea3-1a2b-4418-8be8-6b572a7c168f","time":"2024-04-02T13:09:37+05:30"}
{"level":"info","msg":"successfully acquired lease argo-rollouts/argo-rollouts-controller-lock\n","time":"2024-04-02T13:09:37+05:30"}

Fixes: #3041
Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional with a list of types and scopes found here, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
6.9% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Go Published Test Results

2 160 tests   2 160 ✅  2m 53s ⏱️
  119 suites      0 💤
    1 files        0 ❌

Results for commit cbac5ee.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.87%. Comparing base (8405f2e) to head (cbac5ee).
Report is 71 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3493      +/-   ##
==========================================
+ Coverage   81.83%   82.87%   +1.03%     
==========================================
  Files         135      135              
  Lines       20688    17142    -3546     
==========================================
- Hits        16931    14206    -2725     
+ Misses       2883     2043     -840     
- Partials      874      893      +19     

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[github-actions]

E2E Tests Published Test Results

  4 files    4 suites   3h 48m 7s ⏱️
110 tests 100 ✅  6 💤  4 ❌
456 runs  414 ✅ 24 💤 18 ❌

For more details on these failures, see this check.

Results for commit cbac5ee.