Implement calculating diff of kubernetes manifests

[Warashi]

What this PR does:

as title

Why we need it:

When the K8s plugin determines the sync strategy, it must calculate which parts of the manifests are modified. This calculation is done by calculating the difference between the running deploy source and the target deploy source.

Which issue(s) this PR fixes:

Part of #4980

Does this PR introduce a user-facing change?: No

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[khanhtc1202]

LGTM 👍

[codecov]

Codecov Report

Attention: Patch coverage is 77.04918% with 28 lines in your changes missing coverage. Please review.

Project coverage is 25.17%. Comparing base (c842a89) to head (afff927).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...app/pipedv1/plugin/kubernetes/provider/diffutil.go	80.59%	10 Missing and 3 partials ⚠️
pkg/app/pipedv1/plugin/kubernetes/provider/diff.go	71.42%	8 Missing and 4 partials ⚠️
...app/pipedv1/plugin/kubernetes/provider/resource.go	76.92%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5298      +/-   ##
==========================================
+ Coverage   25.02%   25.17%   +0.14%     
==========================================
  Files         447      449       +2     
  Lines       47520    47642     +122     
==========================================
+ Hits        11892    11992     +100     
- Misses      34690    34705      +15     
- Partials      938      945       +7     

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[ffjlabo]

👍