[stable13] Sharee email matches not limited

[nickvergessen]

Backports:

• Fix from Also array_slice wide email matches of local users #8596
• Tests from Tests for email collaborators pagination #8710

[codecov]

Codecov Report

Merging #8749 into stable13 will decrease coverage by <.01%.
The diff coverage is 90.9%.

@@ Coverage Diff @@## stable13 #8749 +/- ##
==============================================
- Coverage 51.3% 51.29% -0.01% - Complexity 25017 25019 +2 
==============================================
Files 1609 1609 Lines 95285 95291 +6 Branches 1376 1376 ==============================================
+ Hits 48882 48884 +2 - Misses 46403 46407 +4

Impacted Files	Coverage Δ	Complexity Δ
...private/Collaboration/Collaborators/MailPlugin.php	75.72% <90.9%> (+2.53%)	29 <0> (+2)	⬆️
core/js/js.js	65.74% <0%> (-0.56%)	0% <0%> (ø)

[blizzz]

🐘

[MorrisJobke]

Tested and works 👍