Init Terraform plugin

[t-kikuc]

What this PR does:

init the plugin without DetermineVersions, ExecuteStage

Note: Deleted the Sync stage. We will use the Apply stage instead in pipedv1.

Why we need it:

• to start migrating terraform to the plugin

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

Attention: Patch coverage is 78.57143% with 15 lines in your changes missing coverage. Please review.

Project coverage is 28.22%. Comparing base (8a7294e) to head (112a1a4).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/app/pipedv1/plugin/terraform/main.go	0.00%	11 Missing ⚠️
.../app/pipedv1/plugin/terraform/deployment/plugin.go	93.22%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5993      +/-   ##
==========================================
+ Coverage   28.16%   28.22%   +0.06%     
==========================================
  Files         516      518       +2     
  Lines       55933    56003      +70     
==========================================
+ Hits        15754    15809      +55     
- Misses      38925    38940      +15     
  Partials     1254     1254              

Flag	Coverage Δ
.	23.22% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	66.42% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-terraform	78.57% <78.57%> (?)
.-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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[khanhtc1202]

👌

[ffjlabo]

[nit] We can use t.Context().

[t-kikuc]

@ffjlabo Thank you, I fixed:
112a1a4