Rename version constant and reenable release version validation

[timkimadobe]

Description

This PR renames the extension version variable from EXTENSION_VERSION -> VERSION to align with the regex used for .kt files by default for version update/validation.

It also reenables validation of the version in the constants file as part of the release workflow.

See example version job here:

• https://github.com/timkimadobe/aepsdk-analytics-android/actions/runs/13255855795
• Resulting PR: https://github.com/timkimadobe/aepsdk-analytics-android/pull/1/files

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

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)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.56%. Comparing base (dc2a155) to head (01933b5).
Report is 61 commits behind head on dev.

Additional details and impacted files

@@              Coverage Diff              @@
##                dev     #101       +/-   ##
=============================================
+ Coverage     78.92%   90.56%   +11.63%     
- Complexity      286      324       +38     
=============================================
  Files            15       15               
  Lines          1514     1590       +76     
  Branches        184      182        -2     
=============================================
+ Hits           1195     1440      +245     
+ Misses          222       82      -140     
+ Partials         97       68       -29     

Flag	Coverage Δ
android-functional-tests	35.66% <100.00%> (?)
android-unit-tests	90.56% <100.00%> (?)
unit-functional-tests	?

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