Enhancement/add duplicate prog test

[R4R3D1FF]

What type of PR is this?

/kind enhancement

What this PR does / why we need it:

Adds tests for kmesh restart ensuring no duplicate program is present.

Which issue(s) this PR fixes:
Fixes #799

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[kmesh-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[yashisrani]

@R4R3D1FF ci are failing, so please fix it ..

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.53%. Comparing base (32fe3df) to head (0de4347).
⚠️ Report is 18 commits behind head on main.
see 4 files with indirect coverage changes

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[R4R3D1FF]

@R4R3D1FF ci are failing, so please fix it ..

Should work now @yashisrani

[LiZhenCheng9527]

Shouldn't it be cgroup2?

[R4R3D1FF]

I don't think it matters for the focus of this test since it's only supposed to test whether BpfProgUpdate properly replaces the program so that it is removed after no link points to it.

Should I still replace it anyway? (even though it has no actual affect on the functioning of the test)