Refact enum property name

[StevenWatremez]

Currently enums have Enum suffix. This issue is about removing Suffix on Enum types and adding rawValue suffix.

// Before
var toto: String
var totoEnum: Toto { /*…*/ }

// After
var totoRawValue: String
var toto: Toto { /*…*/ }

[StevenWatremez]

We could provide migration templates (in 2 steps?) with Deprecated attributes to help renaming.

// Migration template 1
var totoRawValue: String
@available(*, deprecated, renamed: "totoRawValue")
var toto: String { return totoRawValue }
var totoEnum: Toto { /* … */ }

// Migration template 2
var totoRawValue: String
var toto: Toto { /* … */ }
@available(*, deprecated, renamed: "toto")
var totoEnum: Toto { return toto }