Update to latest version of the unpublised content access patch

[andybroomfield]

Fix #670

Uses the patch in comment 87.
This is the evolution of our current patch, rather than the shortned version.

[stephen-cox]

This fixes the patch failure which makes me think we should get it sooner than later, but I get different test failures on the update test, so perhaps someone else can double check @finnlewis @ekes @Adnan-cds?

[finnlewis]

The new patch applies, but when running phpunit tests locally, I get:

There was 1 error:

1) Drupal\Tests\localgov\Functional\LocalGovUpdateTest::testUpdate
PHPUnit\Framework\Exception: Segmentation fault (core dumped)

Edit: I also get the same error without the patch.

[finnlewis]

The patch works, I have created a separate issue for the error I get: #680

[finnlewis]

I think we should merge this, make a release, then fix the failing tests which look to be unrelated.