Delete platform specific codes from pipedv1

[Warashi]

What this PR does / why we need it:

This PR deletes the platform-specific codes from pipedv1.
Because pipedv1 uses a plugin architecture to implement platform-specific operations, platform-specific codes are not needed except for plugin implementations.

Which issue(s) this PR fixes:

Fixes #

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):

[khanhtc1202]

🚀

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 22.74%. Comparing base (35f0408) to head (cdc4f01).

Files	Patch %	Lines
pkg/app/piped/livestatereporter/reporter.go	0.00%	1 Missing ⚠️
pkg/app/pipedv1/cmd/piped/piped.go	0.00%	1 Missing ⚠️
pkg/app/pipedv1/controller/scheduler.go	0.00%	1 Missing ⚠️
pkg/app/pipedv1/livestatestore/livestatestore.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5051      +/-   ##
==========================================
+ Coverage   22.45%   22.74%   +0.28%     
==========================================
  Files         522      406     -116     
  Lines       57026    43041   -13985     
==========================================
- Hits        12807     9790    -3017     
+ Misses      43192    32473   -10719     
+ Partials     1027      778     -249     

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