Fix SharingBlacklistTest setGetBlacklistedReceiverGroupsProvider

[phil-davis]

Description

Remove invalid $ in setGetBlacklistedReceiverGroupsProvider array.

Motivation and Context

Noticed in drone logs, e.g. https://drone.owncloud.com/owncloud/core/8097/115

[PHP Notice:  Undefined variable: group3 in /drone/src/apps/files_sharing/tests/SharingBlacklistTest.php on line 47]
PHPUnit 5.7.27 by Sebastian Bergmann and contributors.

Runtime:       PHPDBG 7.1.18-1+ubuntu16.04.1+deb.sury.org+1
Configuration: /drone/src/tests/phpunit-autotest.xml

............................................................. 61 / 9155 ( 0%)

How Has This Been Tested?

CI knows what to do

Types of changes

• Bug fix (non-breaking change which fixes an issue) - to unit tests only
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[phil-davis]

Introduced in #31672
Needs to be cherry-picked into wherever that is backported - looks like #31740 @jvillafanez

[codecov]

Codecov Report

Merging #31867 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #31867   +/-   ##
=========================================
  Coverage     63.27%   63.27%           
  Complexity    18479    18479           
=========================================
  Files          1161     1161           
  Lines         69377    69377           
  Branches       1261     1261           
=========================================
  Hits          43895    43895           
  Misses        25112    25112           
  Partials        370      370

Flag	Coverage Δ	Complexity Δ
#javascript	52.47% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	64.5% <ø> (ø)	18479 <ø> (ø)	⬇️

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[PVince81]

masterpiece approved 👍

[phil-davis]

Has to be the smallest bugfix ever - 8-bit delete.

[PVince81]

next achievement will be for "1-bit" delete 😉

[phil-davis]

For backport, commit added to https://github.com/owncloud/core/pull/31740/commits

[PVince81]

seems the commit got lost in a rebase or something, I'll make a new PR

[PVince81]

stable10: #32501

@phil-davis next time I suggest you add a comment on the target PR to make sure the PR owner notices and hopefully doesn't rebase and destroy the commit