(fix) system addressbook enumeration disabled in contacts search

[akhil1508]

• For big instances, inviting attendees is strangely slow
• After doing some logging, I figured out that the query to search on system address book was the culprit
• It turns out that system address book results are skipped anyways at

  calendar/lib/Controller/ContactController.php

  Line 107 in 4c3dd76

  if ($this->contactsService->isSystemBook($r) || !$this->contactsService->hasEmail($r)) {

• So why not just avoid the search query at system address book and get faster searches by setting enumeration to false as per https://github.com/nextcloud/server/blob/d785bcdc6ea27a8d84173813e75c459299ebdbe8/lib/private/ContactsManager.php#L28
• Searches have been much faster after this change for me

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 14.84%. Comparing base (d08a9ba) to head (fec512e).
⚠️ Report is 114 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7299   +/-   ##
=======================================
  Coverage   14.84%   14.84%           
=======================================
  Files         212      212           
  Lines       10299    10299           
  Branches     2484     2484           
=======================================
  Hits         1529     1529           
  Misses       8420     8420           
  Partials      350      350           

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[SebastianKrupinski]

Hi @akhil1508

Thank you for the contribution, I we will need to test this for side effects. Please give us a few days to do so.