Define a ModuleOp that represents a Module as an Operation.

The ModuleOp contains a single region that must contain a single block. This block must be terminated by a new pseudo operation 'module_terminator'. The syntax for this operations is as follows:

  `module` (`attributes` attr-dict)? region

Example:

  module {
    ...
  }

  module attributes { ... } {
    ...
  }

PiperOrigin-RevId: 254513752