remove BpfLoader.KmeshConfig to prevent writing using it, should alwa…

[hzxuzhonghu]

…ys use the method provided

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes: Fixes https://github.com/kmesh-net/kmesh/issues/1344

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 43.39623% with 30 lines in your changes missing coverage. Please review.

Project coverage is 45.68%. Comparing base (a1e0bd3) to head (5a0730b). Report is 34 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/bpf/bpf.go	43.39%	15 Missing and 15 partials :warning:

Files with missing lines	Coverage Δ
pkg/bpf/bpf.go	41.08% <43.39%> (-0.37%)	:arrow_down:

... and 4 files with indirect coverage changes

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[hzxuzhonghu]

/retest

[hzxuzhonghu]

@nlgwcy @LiZhenCheng9527

[LiZhenCheng9527]

/lgtm /approve

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: LiZhenCheng9527

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• ~~pkg/OWNERS~~ [LiZhenCheng9527]

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