[release-0.5] fix slow restart in workload mode

[kmesh-bot]

This is an automated cherry-pick of #924

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 53.03%. Comparing base (dd0b2ab) to head (4774980). Report is 27 commits behind head on release-0.5.

Files with missing lines	Patch %	Lines
pkg/bpf/bpf.go	0.00%	1 Missing :warning:

Files with missing lines	Coverage Δ
pkg/bpf/bpf_kmesh_l4_workload.go	40.69% <100.00%> (+2.32%)	:arrow_up:
pkg/bpf/bpf.go	43.60% <0.00%> (+2.53%)	:arrow_up:

... and 2 files with indirect coverage changes

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[LiZhenCheng9527]

/lgtm

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hzxuzhonghu

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