Split up the networking/pkg to separate packages

[dprotaso]

Replaces: #465

Part of: knative/serving#9957

• bump go.mod to 1.17 and re-vendor
• pull out config-network parsing to it's own package
• split up knative.dev/pkg/network into seperate sub-packages
• use new packages

Note: I created type and func aliases so this change should be backwards compatible

[codecov]

Codecov Report

Merging #670 (059d607) into main (91dcb36) will decrease coverage by 0.00%.
The diff coverage is 95.38%.

@@            Coverage Diff             @@
##             main     #670      +/-   ##
==========================================
- Coverage   94.85%   94.85%   -0.01%     
==========================================
  Files          38       41       +3     
  Lines        1245     1243       -2     
==========================================
- Hits         1181     1179       -2     
  Misses         52       52              
  Partials       12       12              

Impacted Files	Coverage Δ
pkg/http/proxy/bufferpool.go	100.00% <ø> (ø)
pkg/http/stats/request.go	100.00% <ø> (ø)
pkg/config/config.go	86.66% <78.57%> (ø)
pkg/http/error.go	100.00% <100.00%> (ø)
pkg/http/header/header.go	100.00% <100.00%> (ø)
pkg/http/probe/handler.go	100.00% <100.00%> (ø)
pkg/ingress/ingress.go	91.30% <100.00%> (ø)
pkg/k8s/ports.go	100.00% <100.00%> (ø)
pkg/status/status.go	96.35% <100.00%> (ø)

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[dprotaso]

/assign @ZhiminXiang @carlisia @nak3 @psschwei

[ZhiminXiang]

/lgtm

[ZhiminXiang]

nit: 2022

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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[nak3]

I can some boiler plate error as https://github.com/knative/networking/runs/6425664316?check_suite_focus=true but LGTM in general.

As long as I checked pkg/deprecated_config.go can keep the compatibility. (If not, we should fix or revert 😈 )