refactor: split evpn folder

[glimchb]

Working on #268

This PR still keeeps everything in the same package
Will split packages as well next

Signed-off-by: Boris Glimcher [email protected]

[codecov]

Codecov Report

Merging #270 (667e0a7) into main (cdb8b5e) will increase coverage by 2.83%.
The diff coverage is 79.57%.

@@            Coverage Diff             @@
##             main     #270      +/-   ##
==========================================
+ Coverage   58.34%   61.18%   +2.83%     
==========================================
  Files          20       27       +7     
  Lines        1575     1837     +262     
==========================================
+ Hits          919     1124     +205     
- Misses        570      609      +39     
- Partials       86      104      +18     

Files	Coverage Δ
pkg/bridge/bridge.go	56.12% <ø> (ø)
pkg/bridge/bridge_netlink.go	100.00% <ø> (ø)
pkg/bridge/bridge_validate.go	74.28% <ø> (ø)
pkg/port/port.go	65.38% <ø> (ø)
pkg/port/port_validate.go	75.00% <ø> (ø)
pkg/svi/svi.go	48.44% <ø> (ø)
pkg/svi/svi_frr.go	17.64% <ø> (ø)
pkg/svi/svi_netlink.go	100.00% <ø> (ø)
pkg/svi/svi_validate.go	75.67% <ø> (ø)
pkg/vrf/vrf.go	54.76% <ø> (ø)
... and 11 more