Improve istioversion and e2e test

[fjglira]

What type of PR is this?

• Enhancement / New Feature
• Bug Fix
• Refactor
• Optimization
• Test
• Documentation Update

What this PR does / why we need it:

This PR adds a new function to get all the patch versions from each Major.Minor version in the versions.yaml to be used later by the e2e test to iterate over only the latest patch version on each Minor.

• GetLatestPatchVersions returns the last patch version for each Minor
• GetPatchVersionsByMajorMinor returns all the patch versions for every Minor version. This is needed to ensure that the update tests are over the same Major.Minor version
• In the control plane update test I added getBaseAndNewVersion() in favor of getting old and new version directly from istioversion.Old and istioversion.New because this two does not ensure that are different minor versions, and the update test can fail when is upgrade of minor versions (because of changes between
• istio minor version)

This will decrease the execution time of the e2e framework because before we where executing a lot of test for all the versions inside the versions.yaml file, now, we are only going to run the scenario for the latest patch for each Minor version

Which issue(s) this PR fixes:

Fixes #681

Related Issue/PR #

Additional information:

[fjglira]

/test lint

[codecov]

Codecov Report

Attention: Patch coverage is 91.11111% with 4 lines in your changes missing coverage. Please review.

Project coverage is 74.40%. Comparing base (fae4c9f) to head (bee5835).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/istioversion/version.go	91.11%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #686      +/-   ##
==========================================
+ Coverage   74.31%   74.40%   +0.08%     
==========================================
  Files          43       43              
  Lines        2597     2637      +40     
==========================================
+ Hits         1930     1962      +32     
- Misses        574      579       +5     
- Partials       93       96       +3     

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[dgn]

Why this new logic? Can't we just use .Old and .New like before?

[dgn]

and if we replace .Old and .New, we should remove them and put this func (or a similar one) in the istioversion package 🙂

[fjglira]

Because .Old and.New can be different minor versions. Do we want to test also upgrades between versions? I mean, things can be different between minor versions

[fjglira]

/test lint

[luksa]

Shouldn't this be in version.go?

[luksa]

.Name is the version name, not the semantic version number. You should probably use .Version here.

[fjglira]

Fixes #645. This issue was related to not running against all the versions in the versions.yaml file