Use Xcode 26.4.1

[twstokes]

Description

• Uses the Xcode 26.4.1 CI VM image
• Removes the workarounds from Fix the CI building issue due to openssl #25217

Testing instructions

• Ensure CI is green

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 26.9. This milestone is due in less than 4 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

Generated by 🚫 Danger

[wpmobilebot]

🤖 Build Failure Analysis

This build has failures. Claude has analyzed them - check the build annotations for details.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	32039
	Version	PR #25502
	Bundle ID	org.wordpress.alpha
	Commit	08528aa
	Installation URL	0hopep34lti5o

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📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	32039
	Version	PR #25502
	Bundle ID	com.jetpack.alpha
	Commit	08528aa
	Installation URL	1o98vncekeeno

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[crazytonyli]

@twstokes I presume the "DO NOT MERGE" label can be removed?

[twstokes]

@twstokes I presume the "DO NOT MERGE" label can be removed?

Yep. Feel free to merge if you want it. 👍