Add k8s plugin's toolregistry implementation

[Warashi]

What this PR does / why we need it:

The plugin has to pass the tool install script to the piped.
I don't want to pass a script everywhere the plugin tries to install a tool.
So I wrote a wrapper package to hide install script from other implementations.

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):

[Warashi]

These template variables come from the below comments.

pipecd/pkg/app/pipedv1/cmd/piped/service/service.proto

Lines 46 to 51 in c1a06aa

	// - {{ .Name }}: name of the tool.
	// - {{ .Version }}: version of the tool.
	// - {{ .OutPath }}: file path where the tool will be installed.
	// - {{ .TmpDir }}: directory where the tool will be downloaded and extracted.
	// - {{ .Arch }}: GOARCH of the current machine.
	// - {{ .Os }}: GOOS of the current machine.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.

Project coverage is 23.94%. Comparing base (c1a06aa) to head (bb55a18).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...pipedv1/plugin/kubernetes/toolregistry/registry.go	0.00%	10 Missing ⚠️
...kg/app/pipedv1/plugin/toolregistry/toolregistry.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5243      +/-   ##
==========================================
- Coverage   23.95%   23.94%   -0.01%     
==========================================
  Files         437      438       +1     
  Lines       46997    47008      +11     
==========================================
  Hits        11258    11258              
- Misses      34835    34846      +11     
  Partials      904      904              

Flag	Coverage Δ
	23.94% <0.00%> (-0.01%)	⬇️

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[khanhtc1202]

Thank you 👍