Use the correct method when sharing with new user

[harminius]

Fixes: https://github.com/MerginMaps/server-private/issues/2799

Problem:
For CE we use a new API to list project collaborators. We forgot to call it after the invitation is sent.

Solution:
Replace the legacy getProjectAccess method with the new getProjectCollaborators.

[MarcelGeo]

Just double check if something in ee/cloud will be not affected.

[coveralls]

Pull Request Test Coverage Report for Build 13651373731

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.406%

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Totals
Change from base Build 13547339581:	0.0%
Covered Lines:	6778
Relevant Lines:	7335

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💛 - Coveralls

[harminius]

Just double check if something in ee/cloud will be not affected.

Double checked and it works in ee.