Add unit test in path pkg/agent/interfacestore

[wenyingd]

1. Remove unused InterfaceType "HostInterface"
2. Add unit test in path pkg/agent/interfacestore

Signed-off-by: wenyingd wenyingd@vmware.com

[codecov]

Codecov Report

Merging #4265 (2af39a5) into main (e7486d5) will increase coverage by 0.51%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4265      +/-   ##
==========================================
+ Coverage   62.24%   62.75%   +0.51%     
==========================================
  Files         385      385              
  Lines       54513    54511       -2     
==========================================
+ Hits        33929    34211     +282     
+ Misses      18105    17816     -289     
- Partials     2479     2484       +5     

Flag	Coverage Δ
e2e-tests	39.30% <ø> (?)
integration-tests	35.04% <ø> (-0.11%)	⬇️
kind-e2e-tests	48.99% <ø> (+0.84%)	⬆️
unit-tests	43.97% <ø> (+0.13%)	⬆️

Impacted Files	Coverage Δ
pkg/agent/interfacestore/types.go	100.00% <ø> (+22.22%)	⬆️
...trollers/multicluster/resourceexport_controller.go	76.22% <0.00%> (-3.83%)	⬇️
pkg/agent/cniserver/server.go	74.34% <0.00%> (-3.41%)	⬇️
...agent/flowexporter/connections/deny_connections.go	84.94% <0.00%> (-2.16%)	⬇️
...lticluster/commonarea/resourceimport_controller.go	79.55% <0.00%> (-1.49%)	⬇️
...kg/apiserver/registry/system/supportbundle/rest.go	71.30% <0.00%> (-1.31%)	⬇️
...g/agent/cniserver/interface_configuration_linux.go	26.45% <0.00%> (-0.98%)	⬇️
pkg/agent/util/net.go	53.55% <0.00%> (-0.75%)	⬇️
pkg/ovs/openflow/ofctrl_bridge.go	77.26% <0.00%> (-0.58%)	⬇️
pkg/agent/proxy/proxier.go	70.21% <0.00%> (-0.47%)	⬇️
... and 29 more

[jianjuns]

/test-all