Add restart test

[hzxuzhonghu]

What would you like to be added:

Currently restart is an alpha feature, and we have met many issues like bpf map elements duplicate and bpf prog duplicated.

So I would suggest we add some tests to cover this.

In ut test, we can check no same named prog and map duplicated. cc @lec-bit

In e2e test, we can also check that after kmesh restart. cc @YaoZengzeng

[hzxuzhonghu]

FYI added bpfmap elemenets test here 50b4405#diff-00cb5f256b2d787cebd16a54b78b2b92a92c1b51f59283463f1cf737de1d2838

[YaoZengzeng]

/assign