fix helper func num

[lec-bit]

What type of PR is this?
/kind bug

What this PR does / why we need it:
The file bpf/include/bpf_helper_defs_ext.h format does not meet the script kmesh_bpf_env.sh requirements.

kmesh_bpf_env.sh cannot modify the situation where the sequence number and function are not on the same line

Which issue(s) this PR fixes:
Fixes #

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

All modified and coverable lines are covered by tests ✅

Project coverage is 45.87%. Comparing base (a4bc785) to head (02a0c79).
Report is 1 commits behind head on main.

see 1 file with indirect coverage changes

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