fix: use networking informer instead of extensions

[junnplus]

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• Why submit this pull request?

• Bugfix

• Related issues

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Bugfix

• Description
  fix bug: crash when exist v1beta1.Ingress of extensions  #293

[codecov-io]

Codecov Report

Merging #296 (4a3657d) into master (038a047) will increase coverage by 47.78%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           master      #296       +/-   ##
============================================
+ Coverage   52.21%   100.00%   +47.78%     
============================================
  Files          33         1       -32     
  Lines        2321         1     -2320     
============================================
- Hits         1212         1     -1211     
+ Misses        952         0      -952     
+ Partials      157         0      -157     

Impacted Files	Coverage Δ
pkg/api/router/router.go
pkg/version/version.go
pkg/seven/state/route_worker.go
pkg/log/options.go
pkg/seven/state/builder.go
pkg/ingress/apisix/tls.go
pkg/apisix/route.go
pkg/apisix/ssl.go
pkg/apisix/cache/memdb.go
pkg/kube/translation/annotations.go
... and 22 more

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[membphis]

ping @gxthrj