twentytwentyfive is shipping without comments on pages by default, unit test data makes testing confusing

[HeatherActon]

Related to: https://github.com/WordPress/twentytwentyfive/issues/490

When testing twentytwentyfive theme with the current unit test data, "Page with comments" content says that comments should be displayed. But in the issue linked above, it was decided that twentytwentyfive would not have comments displayed by default.

Suggest that we update the content to reflect the differences between core themes at least?

[joyously]

The test content shouldn't change just because a core theme doesn't do it correctly.