proxy_ssl_name support

[janosi]

What this PR does / why we need it:

It implements the support of proxy_ssl_name on server and location levels.

Credit goes to the original PR #4639 , this is only a continuation of that, with the additional location level support requested in that PR.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Which issue/s this PR fixes

How Has This Been Tested?

Unit test

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

Hi @janosi. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[aledbf]

/ok-to-test

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@35264d6). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #5166   +/-   ##
=========================================
  Coverage          ?   58.61%           
=========================================
  Files             ?       88           
  Lines             ?     6872           
  Branches          ?        0           
=========================================
  Hits              ?     4028           
  Misses            ?     2402           
  Partials          ?      442

Impacted Files	Coverage Δ
internal/ingress/annotations/proxyssl/main.go	95.31% <100%> (ø)

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[janosi]

/retest

[aledbf]

/lgtm
/approve

[aledbf]

@janosi thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, janosi

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

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Needs approval from an approver in each of these files:

• OWNERS [aledbf]

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