Fix various return types

[Haselnussbomber]

There are probably more wrong.
Not sure if the return type of InventoryItem.ctor is ever used, but the others are.

[github-actions]

Breaking Changes

Member exists in left but not in right

FFXIVClientStructs.FFXIV.Component.SteamApi.SteamApi.Delegates: 1

Ctor: 2

• void Invoke(FFXIVClientStructs.FFXIV.Component.SteamApi.SteamApi*)
• void EndInvoke(System.IAsyncResult)

FFXIVClientStructs.FFXIV.Component.SteamApi: 1

SteamApi: 1

• void Ctor()

FFXIVClientStructs.FFXIV.Client.System.String.Utf8String.Delegates: 1

SanitizeString: 2

• void Invoke(FFXIVClientStructs.FFXIV.Client.System.String.Utf8String*, ushort, FFXIVClientStructs.FFXIV.Client.System.String.Utf8String*)
• void EndInvoke(System.IAsyncResult)

FFXIVClientStructs.FFXIV.Client.System.String: 1

Utf8String: 1

• void SanitizeString(ushort, FFXIVClientStructs.FFXIV.Client.System.String.Utf8String*)

FFXIVClientStructs.FFXIV.Client.UI.Misc.CharaViewPortrait.Delegates: 1

Ctor: 2

• void Invoke(FFXIVClientStructs.FFXIV.Client.UI.Misc.CharaViewPortrait*)
• void EndInvoke(System.IAsyncResult)

FFXIVClientStructs.FFXIV.Client.UI.Misc: 1

CharaViewPortrait: 2

• FFXIVClientStructs.FFXIV.Client.UI.Misc.CharaViewPortrait* Create()
• void Ctor()

CP0008

Global: 1

• FFXIVClientStructs.FFXIV.Client.UI.Misc.CharaViewPortrait does not implement interface FFXIVClientStructs.FFXIV.Client.System.Memory.ICreatable