Enable PPR in Dynamic IO tests (#79301)
To prepare for an upcoming change where `ppr` will be enabled
automatically when `dynamicIO` is enabled, we're hard coding `ppr: true`
in the Dynamic IO tests with this PR. The non-PPR assertions are
subsequently removed, which makes up most of the changed lines.
We can now also exclude the tests in the PPR tests manifest, so that
they're not run twice in CI.
> [!NOTE]
> This PR is best reviewed with hidden whitespace changes.
