feat: Updating Antrea version to v0.5.1

[reachjainrahul]

Release note covers the changes
https://github.com/vmware-tanzu/antrea/releases/tag/v0.5.0

Reason for Change:

Issue Fixed:

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[acs-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: reachjainrahul
To complete the pull request process, please assign mboersma
You can assign the PR to them by writing /assign @mboersma in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[jackfrancis]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov]

Codecov Report

Merging #2970 into master will decrease coverage by 0.48%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #2970      +/-   ##
==========================================
- Coverage   72.57%   72.09%   -0.49%     
==========================================
  Files         141      141              
  Lines       25893    26252     +359     
==========================================
+ Hits        18793    18927     +134     
- Misses       6006     6230     +224     
- Partials     1094     1095       +1     

Impacted Files	Coverage Δ
pkg/api/k8s_versions.go	100.00% <ø> (ø)
pkg/engine/templates_generated.go	31.57% <0.00%> (-3.25%)	⬇️
pkg/api/types.go	93.99% <0.00%> (-1.17%)	⬇️
pkg/engine/armvariables.go	87.15% <0.00%> (-0.13%)	⬇️
pkg/api/defaults.go	92.20% <0.00%> (-0.09%)	⬇️
pkg/engine/virtualmachinescalesets.go	81.11% <0.00%> (-0.04%)	⬇️
pkg/engine/artifacts.go	100.00% <0.00%> (ø)
pkg/engine/keyvaults.go	100.00% <0.00%> (ø)
... and 7 more

---

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 959247d...4eb8e6e. Read the comment docs.

[reachjainrahul]

/assign @jackfrancis . Ran azure e2e tests locally and it passed for 0.5.1

[reachjainrahul]

/azp run pr-e2e

[azure-pipelines]

Commenter does not have sufficient privileges for PR 2970 in repo Azure/aks-engine

[jackfrancis]

/lgtm

[jackfrancis]

/azp run pr-e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).