Use go sync/atomic instead of go.uber.org/atomic

[nak3]

Since Go 1.19, new type for sync/atomic was introduced like Int32 and Bool so it is possible to replace go.uber.org/atomic.

This patch makes the change.

Release Note

NONE

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.03% 🎉

Comparison is base (7b50f3c) 81.75% compared to head (f6dcc59) 81.79%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2777      +/-   ##
==========================================
+ Coverage   81.75%   81.79%   +0.03%     
==========================================
  Files         167      167              
  Lines       10201    10204       +3     
==========================================
+ Hits         8340     8346       +6     
+ Misses       1614     1612       -2     
+ Partials      247      246       -1     

Files Changed	Coverage Δ
metrics/metrics.go	83.33% <100.00%> (ø)
profiling/server.go	75.92% <100.00%> (+1.41%)	⬆️

... and 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[krsna-m]

/approve
/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kvmware, nak3

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [kvmware,nak3]
• apis/duck/OWNERS [kvmware]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment