Change reservation unit text search to use AND instead of OR

[matti-lamppu]

🛠️ Changelog

• This works more like the previous search, with the omission of commas being used to search in OR-fashion (not used based on search history)
• Should likely be changed back to OR when we have a "similarity" ordering so that results containing more of the given words are shown first, but those that contain some of them can still be shown (This should also weigh finding the search word from
  the name of the reservation unit more than from the description for example)

🧪 Test plan

• Automated tests

🚧 Dependencies

• None

🎫 Tickets

• None

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud