Add Logical Type support for java.util.UUID

[MichalFoksa]

This PR adds logical type uuid into java.util.UUID Avro schema.

Until now UUID schema was:

{
  "type" : "fixed",
  "name" : "UUID",
  "namespace" : "java.util",
  "size" : 16
}

Now, with logicalTypesEnabled = true, schema is:

{
  "type" : "fixed",
  "name" : "UUID",
  "namespace" : "java.util",
  "size" : 16,
  "logicalType" : "uuid"        <----- new property
}

[cowtowncoder]

Thank you @MichalFoksa ! Merged for inclusion in 2.19.0.

[MichalFoksa]

@cowtowncoder
You are welcome!

[MichalFoksa]

PR with Decimal logical type will come later.

I think we will need a new annotation to express decimal precision and scale. Probably @Decimal(precision = 2, scale = 10).

I will suggest something in PR and we can discuss it.

Merry Christmas 🎅 🎄!

[cowtowncoder]

Merry Christmas @MichalFoksa !