Integrated: Update parser tests

[Maurizio Cimadamore]

On Fri, 19 Dec 2025 16:58:39 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This PR updates the parser tests to reflect the latest changes in the programming model.
> This led to minor parser tweaks to javac parser, to make sure that sensible error messgaes were being reported when null-restricted types are used in the wrong place.

This pull request has now been integrated.

Changeset: 895fe561
Author:    Maurizio Cimadamore <mcimadamore at openjdk.org>
URL:       https://git.openjdk.org/valhalla/commit/895fe561746ca3ce48481bde284ec3a3e1b84fd3
Stats:     707 lines in 6 files changed: 295 ins; 397 del; 15 mod

Update parser tests

Reviewed-by: vromero

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PR: https://git.openjdk.org/valhalla/pull/1847