feat(*): support SMI traffic split v1alpha4

[michelleN]

WIP

• updates OSM to support SMI Traffic Split v1alpha4
  which includes HTTPRouteGroup support enabling scenarios
  such as A/B testing and routing based on HTTP attributes

• resolves Allow splitting traffic to same FQDN using multiple traffic split policies matching different routes #2759
• resolves Add SMI Traffic Split (v1alpha4) support in the routes v2 feature  #2368

Signed-off-by: Michelle Noorali minooral@microsoft.com

Please mark with X for applicable areas.

-->
Affected area:

• New Functionality [ ]
• Documentation [ ]
• Install [ ]
• Control Plane [X ]
• CLI Tool [ ]
• Certificate Management [ ]
• Networking [ ]
• Metrics [ ]
• SMI Policy [X ]
• Security [ ]
• Tests [ ]
• CI System [ ]
• Demo [ ]
• Performance [ ]
• Other [ ]

Please answer the following questions with yes/no.

• Does this change contain code from or inspired by another project? If so, did you notify the maintainers and provide attribution? No

[codecov-io]

Codecov Report

Merging #2870 (5770346) into main (70d6bf2) will increase coverage by 0.20%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #2870      +/-   ##
==========================================
+ Coverage   65.17%   65.38%   +0.20%     
==========================================
  Files         152      152              
  Lines        6904     6904              
==========================================
+ Hits         4500     4514      +14     
+ Misses       2378     2364      -14     
  Partials       26       26              

Flag	Coverage Δ
unittests	65.38% <50.00%> (+0.20%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/catalog/debugger.go	97.14% <ø> (ø)
pkg/catalog/mock_catalog_generated.go	0.00% <0.00%> (ø)
pkg/debugger/policy.go	53.84% <ø> (ø)
pkg/smi/fake.go	0.00% <ø> (ø)
pkg/smi/mock_meshspec_generated.go	0.00% <0.00%> (ø)
pkg/debugger/mock_debugger_generated.go	56.14% <100.00%> (ø)
pkg/smi/client.go	80.00% <100.00%> (ø)
pkg/injector/health_probes.go	87.17% <0.00%> (ø)
pkg/catalog/xds_certificates.go	90.00% <0.00%> (ø)
pkg/configurator/validating_webhook.go	80.00% <0.00%> (+9.65%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 70d6bf2...5770346. Read the comment docs.

[bridgetkromhout]

When resolving merge conflicts, please make docs changes in https://github.com/openservicemesh/osm-docs as appropriate - thanks!

[michelleN]

Closing as this is now stale.