Angular: v21.0.4 Release

compiler

| Commit | Description | | -- | -- | | | chain query creation instructions |

compiler-cli

| Commit | Description | | -- | -- | | | expand type for native controls with a dynamic type |

forms

| Commit | Description | | -- | -- | | | expose element on signal forms Field directive | | | redo the signal forms metadata API | | | add signals for dirty, hidden, and pending states in custom controls | | | allow resetting with empty string | | | memoize reads of child fields in signal forms (#65802) | | | Reuse key in parent in compat structure |