[10.2.0] Set mail_send via old share API

[VicDeo]

Backport of #35136

Description

Partially reverts 129d5e1

Related Issue

• Fixes Notify by email on group share can be done multiple times #35089

Motivation and Context

It's possible to notify group about share multiple times

How Has This Been Tested?

In accordance with #35089

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:

Open tasks:

• Backport (if applicable set "backport-request" label and remove when the backport was done)

[PVince81]

👍

[codecov]

Codecov Report

Merging #35137 into release-10.2.0 will increase coverage by 0.01%.
The diff coverage is 0%.

@@                 Coverage Diff                  @@
##             release-10.2.0   #35137      +/-   ##
====================================================
+ Coverage             64.38%   64.39%   +0.01%     
+ Complexity            20049    20047       -2     
====================================================
  Files                  1285     1285              
  Lines                 76851    76840      -11     
  Branches               1308     1308              
====================================================
+ Hits                  49478    49479       +1     
+ Misses                26989    26977      -12     
  Partials                384      384

Flag	Coverage Δ	Complexity Δ
#javascript	53.66% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	65.53% <0%> (+0.01%)	20047 <6> (-2)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
...es_sharing/lib/Controller/Share20OcsController.php	87.56% <0%> (+1.7%)	201 <6> (-2)	⬇️
lib/private/Server.php	86.66% <0%> (+0.11%)	253% <0%> (ø)	⬇️

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