Include RC suffix in version compare

[vraja-pro]

Context

Summary

This PR can be summarized in the following changelog entry:

• Takes into account the RC part of the version number when comparing it.

Relevant technical choices:

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• Install and activate Free SEO 25.6-RC2 + Premium 25.6-RC1
• Create a new post
• Check you see the "Use AI" button for SEO Title/Description
• Now downgrade Premium to a previous version, like 25.4
• Check you still see the "Use AI" button for SEO Title/Description

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• Changes should be tested on different editors (Default Block/Gutenberg/Classic/Elementor/other)
• Changes should be tested on different browsers
• Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

QA can test this PR by following these steps:

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Other environments

• This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

Documentation

• I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes https://github.com/Yoast/plugins-automated-testing/issues/2417

[coveralls]

Pull Request Test Coverage Report for Build 5f21fd8a5b36c721e3f8049cc361e283fe7bfe9c

Details

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.5%) to 52.116%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/conditionals/ai-editor-conditional.php	0	2	0.0%

Totals
Change from base Build 701937920c8e99451d6c7529be97335e8992b0d2:	-0.5%
Covered Lines:	30428
Relevant Lines:	59121

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💛 - Coveralls

[pls78]

CR && Acc: ✅