[data_release] Fixes issue where users able to upload files to projects they do not have access to.

[racostas]

Brief summary of changes

• Modifies modules/data_release/php/data_release.class.inc to only show the projects the user have access in the SelectBox.
• Modifies modules/data_release/php/files.class.inc to check the user have access to the project before allowing the insertion.

Testing instructions (if applicable)

1. Go to 'data_release' with a user affiliated only to certain projects.
2. Click on 'upload file'
3. Click on 'project
4. Note that only the projects the user have access to are listed.

5. Try to upload a file and checks it properly uploads.
6. Try to change to another user and please repeat steps 1 to 5.
7. The rest of the functionalities should remain unchanged.

Link(s) to related issue(s)

• Resolves [data_release] User can upload files to projects that he does not have access to #10637

[racostas]

I will be fixing the code formatting ...

[lapadulamichael]

LGTM!