Fix migration failure if a DML function refers to required property.

[dnwpark]

Splits altering DML functions into a paired DeleteFunction and CreateFunction. This fixes issues when adding/removing required, renaming, or changing the type of a pointer in the same migration as the function change.

For example, when migrating from:

  type Foo { required a: int64; }
  function insert_foo() -> Foo using ( insert Foo { a := 1 } );

to:

  type Foo {}
  function insert_foo() -> Foo using ( insert Foo {} );

close #8377

[github-actions]

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(Last updated: Feb 26, 2025, 23:00:50 UTC)