[Swift] usableFromInline attribute for _minAlignment

[amitahire]

Swift Code generator does not generate setter and getter unless the variable is marked with attribute. Mainly while generating XCFramework and interfaces for different architectures.

• The generated build/framework generally works if the build is built only for one architecture ( because the compiler maybe generated the code properly for the particular architecture

• While generating XCFramework - compiler doesn't know or cannot resolve during runtime - Hence the interface needs to generate the appropriate getters and setter to provide the compiler the appropriate clues.

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[CasperN]

@mustiikhalil

[mustiikhalil]

@amitahire can you sign the google doc? so we can move forward with this?

[dbaileychess]

@amitahire Any update?

[dbaileychess]

Closing due to lack of activity.