felix: ensure vxlan udp flows are not tracked in conntrack

[cyclinder]

Description

felix: ensure vxlan udp flows are not tracked in conntrack

Related issues/PRs

fixes #8934

Todos

• Tests
• Documentation
• Release note

Release Note

TBD

Reminder for the reviewer

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[fasaxc]

Thanks for the contribution @cyclinder! I spotted one issue (there's a dedicated action for NOTRACK)

[fasaxc]

Suggested change

	// ensure VXLAN UDP Flows are not tracked in conntrack
	// Ensure VXLAN UDP Flows are not tracked in conntrack.

[cyclinder]

All the unit tests are green.

root@10-20-1-200:/home/cyclinder/calico# go test -v ./felix/rules
=== RUN   TestRules
Running Suite: Rules Suite
==========================
Random Seed: 1720161858
Will run 506 of 506 specs

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JUnit report was created: /home/cyclinder/calico/felix/report/rules_suite.xml

Ran 506 of 506 Specs in 0.301 seconds
SUCCESS! -- 506 Passed | 0 Failed | 0 Pending | 0 Skipped

You're using deprecated Ginkgo functionality:
=============================================
Ginkgo 2.0 is under active development and will introduce several new features, improvements, and a small handful of breaking changes.
A release candidate for 2.0 is now available and 2.0 should GA in Fall 2021.  Please give the RC a try and send us feedback!
  - To learn more, view the migration guide at https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md
  - For instructions on using the Release Candidate visit https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md#using-the-beta
  - To comment, chime in at https://github.com/onsi/ginkgo/issues/711

  You are using a custom reporter.  Support for custom reporters will likely be removed in V2.  Most users were using them to generate junit or teamcity reports and this functionality will be merged into the core reporter.  In addition, Ginkgo 2.0 will support emitting a JSON-formatted report that users can then manipulate to generate custom reports.

  If this change will be impactful to you please leave a comment on https://github.com/onsi/ginkgo/issues/711
  Learn more at: https://github.com/onsi/ginkgo/blob/ver2/docs/MIGRATING_TO_V2.md#removed-custom-reporters

To silence deprecations that can be silenced set the following environment variable:
  ACK_GINKGO_DEPRECATIONS=1.16.5

--- PASS: TestRules (0.45s)
PASS
ok  	github.com/projectcalico/calico/felix/rules	0.496s

[lwr20]

/sem-approve