Implement Dynamic Batch Actions

[deusaquilus]

In Scala2-Quill, dynamic batch actions are not supported (i.e. doing them will cause an error - see here) however, because they do not require and inline def, porting them to Scala 3 will result in a dynamic-batch-action with the same code as before. This was discovered original in the Quill testing codebase in the following: form:

// Dynamic in Scala2-Quill, static in ProtoQuill
val insertPeople = quote((p: Person) => query[Person].insert(p))
val mirror = ctx.run { liftQuery(people).foreach(p => insertPeople(p)) }

I.e. since insertPeople is not an inline def, it becomes dynamic in ProtoQuill. That means that if we don't support dynamic queries this code will not be portable.

For this reason, I have decided to implement dynamic-batch-queries in ProtoQuill. This required an extensive refactoring of BatchExecutionQuery.scala.