Implemented toolRegistry of Terraform plugin

[t-kikuc]

What this PR does:

as title

Why we need it:

to install terraform command

Which issue(s) this PR fixes:

Part of #5992

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

All modified and coverable lines are covered by tests ✅

Project coverage is 28.23%. Comparing base (eb367ea) to head (8710e52).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5995      +/-   ##
==========================================
+ Coverage   28.21%   28.23%   +0.01%     
==========================================
  Files         518      519       +1     
  Lines       56003    56009       +6     
==========================================
+ Hits        15803    15815      +12     
+ Misses      38946    38940       -6     
  Partials     1254     1254              

Flag	Coverage Δ
.	23.22% <ø> (+0.01%)	⬆️
.-pkg-app-pipedv1-plugin-kubernetes	66.42% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-terraform	80.26% <100.00%> (+1.69%)	⬆️
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-plugin-sdk	50.89% <ø> (ø)
.-tool-actions-gh-release	19.23% <ø> (ø)
.-tool-actions-plan-preview	25.30% <ø> (ø)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (ø)

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[Warashi]

LGTM

[ffjlabo]

LGTM