[Playlists] Increase max filter items limit

[danielebogo]

📘 Part of: Playlists

Fixes PCIOS-94

This PR increases the limit of the displayed episodes for Playlists

To test

• Make sure you have the rebranding ff on
• Make sure you have a big database with many podcasts to reach more than 1000 episodes
• Create a filter with all podcasts
• The limit should be 1000
• Do the test with the FF off and confirm the limit status at 500
• To check the limit add a breakpoint in func queryFor(filter: EpisodeFilter, episodeUuidToAdd: String?, limit: Int) -> String

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[SergioEstevao]