✨ Support `iosArm64` Kotlin Native target

[LVMVRQUXL]

📝 Description

As suggested by @MichaelStH in the issue #842, we want to support the iosArm64 Kotlin Native target.

Accordingly to the Kotlin documentation about Kotlin Native targets, the iosArm64 Kotlin Native target doesn't support running tests in Gradle and IDE for now. We might have difficulties for testing Kotools Types on this target in our integration GitHub workflow. So feel free to suggest any idea for testing this new Kotlin Native target in the comments below.

✅ Checklist

See the Issue implementation section in the contributing guidelines before addressing the following checklist.

• ✨ Add the target in the Gradle convention plugin for Kotlin Multiplatform.
• 📝 Add a badge for the new target in the README documentation of the root Gradle project.
• 📝 Add a badge for the new target in the README documentation of the types-kotlinx-serialization Gradle project.
• 📝 Update the unreleased changelog for this issue.