External network members endpoints

[iljarotar]

Description

Implements endpoints for external network members. An external member is a host that is connected to one of our racks but is not itself registered at the api.

depends on metal-stack/api#188

TODO

• validate network type
• validate only unmanaged ports can be added as external members
• validate machine register is only allowed for internal or unmanaged ports
• when a machine registers at an unmanaged port it must be set to internal
• when a machine gets deleted from the database the port must be set to unmanaged

[codecov]

Codecov Report

❌ Patch coverage is 78.64583% with 41 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.97%. Comparing base (bb7c6ce) to head (b17e252).

Files with missing lines	Patch %	Lines
pkg/test/scenarios/spec.go	64.28%	15 Missing ⚠️
pkg/db/generic/initialize.go	7.69%	12 Missing ⚠️
pkg/repository/network.go	92.00%	8 Missing ⚠️
pkg/test/datacenter.go	82.60%	4 Missing ⚠️
cmd/server/datastore-cmd.go	0.00%	1 Missing ⚠️
pkg/service/admin/network/network-service.go	91.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #302      +/-   ##
==========================================
+ Coverage   79.93%   79.97%   +0.04%     
==========================================
  Files         199      200       +1     
  Lines       14800    14941     +141     
==========================================
+ Hits        11830    11949     +119     
- Misses       2969     2991      +22     
  Partials        1        1              

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