[EOSF-839] Make use of fingerprinted osf-assets for OSF Preprint logoSharing

[adlius]

Purpose

Currently, the og:image meta tags for OSF Preprint reference to an incorrect asset. This change should fix that to refer to fingerprinted assets in our osf-assets repo.

Summary of Changes

In theme.js, OSF Preprint's logo.path is no longer referencing to assets in ember-osf-preprints. Instead, it is changed to use the same buildProviderAssetPath method that builds fingerprinted assets urls for all provider assets.
Therefore, environment.js is changed to remove the providers list that includes information that is no longer necessary for building OSF Preprint assets.

Side Effects / Testing Notes

None

Ticket

https://openscience.atlassian.net/browse/EOSF-839

Reviewer Checklist

• meets requirements
• easy to understand
• DRY
• testable and includes test(s)
• changes described in CHANGELOG.md

[jamescdavis]

See inline comment. Also, need to remove pathJoin import.

[jamescdavis]

Could also now just:

return {
    path: buildProviderAssetPath(config, this.get('id'), 'sharing.png', this.get('isDomain')),
    type: 'image/png',
    width: 1200,
    height: 630
};

[coveralls]

Coverage increased (+0.01%) to 25.894% when pulling 8036ab6 on adlius:og-image into 1a8215a on CenterForOpenScience:release/post-review-actions.

[jamescdavis]

consistency is good!