Update to core 14

[papafe]

TODO

• Changelog entry
• Tests (if applicable)
• Wait for core to fix issue regarding queries with decimals. realm/realm-core@b1d32d3
• Fix issue regarding "fake" sync tests
• Fix issue regarding opening "guid.realm" realm in read only mode. Prevent opening files with file format 23 in read-only mode realm-core#7389
• Check which realm studio version is correct

[papafe]

Most of the changes are here, but we still need to wait for the fixes to the problems found during testing and the correct realm studio version. They are all tracked in the PR description

[coveralls-official]

Pull Request Test Coverage Report for Build 8157612324

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 406 unchanged lines in 23 files lost coverage.
• Overall coverage decreased (-4.2%) to 76.694%

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Files with Coverage Reduction	New Missed Lines	%
Realm/Realm/Native/HttpClientTransport.cs	2	62.0%
Realm/Realm/Helpers/SerializationHelper.cs	3	52.42%
Realm/Realm/Sync/Credentials.cs	3	64.52%
Realm/Realm/Sync/UserIdentity.cs	3	0.0%
Realm/Realm/Configurations/SyncConfigurationBase.cs	4	87.23%
Realm/Realm/Extensions/TestingExtensions.cs	4	0.0%
Realm/Realm/Native/UserApiKey.cs	4	0.0%
Realm/Realm/Handles/AsyncOpenTaskHandle.cs	6	31.82%
Realm/Realm/Realm.cs	6	91.04%
Realm/Realm/Sync/ProgressNotifications/SyncProgress.cs	6	0.0%

Totals
Change from base Build 8047867358:	-4.2%
Covered Lines:	6270
Relevant Lines:	8093

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💛 - Coveralls