fix: disable resharing of incoming shared calendars

[st3iny]

Fix #5755

Before	After

[st3iny]

/backport to stable4.6

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (9d54b96) 24.50% compared to head (c370c11) 24.49%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/components/AppNavigation/EditCalendarModal.vue	0.00%	3 Missing ⚠️
...ts/AppNavigation/CalendarList/CalendarListItem.vue	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5757      +/-   ##
============================================
- Coverage     24.50%   24.49%   -0.01%     
  Complexity      423      423              
============================================
  Files           243      243              
  Lines         10934    10938       +4     
  Branches       1795     1797       +2     
============================================
  Hits           2679     2679              
- Misses         8255     8259       +4     

Flag	Coverage Δ
javascript	15.44% <0.00%> (-0.01%)	⬇️
php	61.92% <ø> (ø)

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