Add toolRegistry as a common field for the Client in the SDK

[ffjlabo]

What this PR does:

as title

Why we need it:

We need it to install tools to load manifests and deploy them to the platform for the platform-specific plugin.
(e.g. k8s plugin's DetermineStrategy, DetermineVersion, ExecuteStage)

Also, we need it for the stage plugin to execute any tool on the generic stage.

It is better to set it on the SDK side because it requires a piped service client.

Which issue(s) this PR fixes:

Part of #5530

Does this PR introduce a user-facing change?:

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

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 26.57%. Comparing base (6cf5097) to head (088f44e).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/plugin/sdk/client.go	0.00%	2 Missing ⚠️
pkg/plugin/sdk/deployment.go	50.00%	1 Missing ⚠️
pkg/plugin/sdk/sdk.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5621      +/-   ##
==========================================
+ Coverage   26.56%   26.57%   +0.01%     
==========================================
  Files         475      475              
  Lines       50582    50590       +8     
==========================================
+ Hits        13438    13446       +8     
+ Misses      36081    36080       -1     
- Partials     1063     1064       +1     

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