Add pipectl migrate application-config command

[Warashi]

What this PR does:

SSIA

Why we need it:

We have to provide a way to migrate application config files.

Which issue(s) this PR fixes:

Part of #5542

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

❌ Patch coverage is 0% with 157 lines in your changes missing coverage. Please review.
✅ Project coverage is 28.43%. Comparing base (291c3ff) to head (24c8583).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/app/pipectl/cmd/migrate/application_config.go	0.00%	156 Missing ⚠️
pkg/app/pipectl/cmd/migrate/migrate.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6175      +/-   ##
==========================================
- Coverage   28.52%   28.43%   -0.09%     
==========================================
  Files         536      537       +1     
  Lines       57375    57532     +157     
==========================================
- Hits        16365    16361       -4     
- Misses      39738    39898     +160     
- Partials     1272     1273       +1     

Flag	Coverage Δ
.	23.03% <0.00%> (-0.08%)	⬇️
.-pkg-app-pipedv1-plugin-analysis	62.85% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	60.24% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.48% <ø> (ø)
.-pkg-app-pipedv1-plugin-scriptrun	54.83% <ø> (ø)
.-pkg-app-pipedv1-plugin-terraform	38.31% <ø> (ø)
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-waitapproval	68.62% <ø> (ø)
.-pkg-plugin-sdk	50.12% <ø> (-0.20%)	⬇️
.-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]

LNeatTM👌

[ffjlabo]

This is the great step. Let's try!