Skip offload authz policy when link source is waypoint pod

[LiZhenCheng9527]

What type of PR is this?
/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #1394

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[kmesh-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

Attention: Patch coverage is 28.00000% with 36 lines in your changes missing coverage. Please review.

Project coverage is 46.13%. Comparing base (3f0912e) to head (f4bfb02).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/workload/workload_processor.go	34.48%	16 Missing and 3 partials ⚠️
pkg/controller/workload/bpfcache/waypoint.go	0.00%	10 Missing ⚠️
pkg/controller/workload/cache/waypoint_cache.go	36.36%	7 Missing ⚠️

❌ Your patch check has failed because the patch coverage (28.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Files with missing lines	Coverage Δ
pkg/controller/workload/cache/waypoint_cache.go	72.90% <36.36%> (-2.61%)	⬇️
pkg/controller/workload/bpfcache/waypoint.go	0.00% <0.00%> (ø)
pkg/controller/workload/workload_processor.go	60.49% <34.48%> (-1.25%)	⬇️

... and 1 file with indirect coverage changes

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