[RN][iOS] Add checks on iOS 17 to compile out UIHoverStyle when not supported

[cipolleschi]

Summary:

Commit 73664f5 broke two jobs in CircleCI that we run using Xcode 14.3.1 because the commit introduced some types that are available only to iOS 17.
The code was wrapped around if(@available()) statement, but this does not compile out the code. It is a runtime check and the code needs to build anyway.

This takes effect at compile time as well. However, unlike with #available, the method must type check and compile. The code will always be emitted into your binary: however, it will only be used when the binary is executed on platforms that meet the availability requirements.

source: https://forums.swift.org/t/if-vs-available-vs-if-available/40266/2

This change should fix it, introducing some compile time pragmas that removes the code if we build with older versions of Xcode

Changelog:

[iOS][Changed] - Compile out UIHoverStyle code for older Xcode versions

Test Plan:

CircleCI is green

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