fix(normalization): Added parsing of raw OS description for iOS and iPadOS coming from Unity

[bitsandfoxes]

The Unity SDK reports the OS via raw description in the following format:

Mac OS X 14.4.1
iPadOS 17.5.1
iOS 17.5.1
Android OS 14 / API-34 (AP2A.240605.024/11860263)

The context normalization deals just fine with macOS and Android but skips iOS and iPadOS and sets the version into the kernel_version instead. This seems to lead to missing os tags as reported by a user:

Looking at the automatically created tags I get

"tags": [
    [
      "device",
      "Mac15,8"
    ],
    [
      "os",
      "macOS 14.4.1"
    ],
    [
      "os.name",
      "macOS"
    ],
  ],

and

"tags": [
    [
      "device",
      "Google Pixel 6"
    ],
    [
      "os",
      "Android 14"
    ],
    [
      "os.name",
      "Android"
    ],
  ],

for macOS and Android but end up with only os.name on the mobile devices:

  "tags": [
    [
      "device",
      "iPad11,1"
    ],
    [
      "os.name",
      "iPadOS"
    ],
  ],

The deleted test also indicates, that this behaviour is not necessarily intentional in the first place.