chore: allow configuration of simulator sdk version when running spm tests

[jnewc]

Description

The simulator sdk version must be specified when running SPM tests, so the xcode version matrix workflow needs it to be configurable.

The version compatibility table for macOS/Xcode/Simulator is here.

Contributor Checklist

• All status checks have passed prior to code review
• I have added unit tests to a reasonable level of coverage where suitable
• I have added UI tests to new user flows, if applicable
• I have manually tested newly added UX
• I have open a documentation PR, if applicable

Reviewer Checklist

• I have verified that a suitable set of automated tests has been added
• I have verified that the title prefix aligns to the code changes + whether a release is expected after merging the PR
• I have verified the documentation PR aligns with this PR, if applicable

Before Merging

• If introducing a breaking change, I have communicated it internally
• Any related documentation PRs are ready to merge

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[github-actions]

	Warnings
⚠️	This PR doesn't seem to contain any updated Unit Test 🤔. Please consider double checking it.🙏
⚠️	Please assign someone aside from CODEOWNERS (@checkout-pci-reviewers) to review this PR.

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[github-actions]

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