add convert webhook for gateway

[River-sh]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind enhancement
/kind feature
/sig network

What this PR does / why we need it:

add convert webhook for gateway

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind enhancement
/kind feature
/sig network

What this PR does / why we need it:

add convert webhook for gateway

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
3 Code Smells

No Coverage information
6.2% Duplication

Catch issues before they fail your Quality Gate with our IDE extension SonarLint

[codecov]

Codecov Report

Merging #1724 (4d3cc05) into master (8b94570) will decrease coverage by 0.82%.
Report is 11 commits behind head on master.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1724      +/-   ##
==========================================
- Coverage   52.46%   51.64%   -0.82%     
==========================================
  Files         162      168       +6     
  Lines       19091    20063     +972     
==========================================
+ Hits        10016    10362     +346     
- Misses       8150     8716     +566     
- Partials      925      985      +60     

Flag	Coverage Δ
unittests	51.64% <ø> (-0.82%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 33 files with indirect coverage changes

[rambohe-ch]

/lgtm

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rambohe-ch, River-sh

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• OWNERS [rambohe-ch]

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