EZP-32108: Added CustomField sort clause

[adamwojs]

Question	Answer
JIRA issue	EZP-32108
Type	feature
Target eZ Platform version	v3.3
BC breaks	no
Doc needed	yes
Related PRs	https://github.com/ezsystems/ezplatform-elastic-search-engine/pull/23 ezsystems/ezplatform-solr-search-engine#204

Added \eZ\Publish\API\Repository\Values\Content\Query\SortClause\CustomField which allows sort search results using raw search index field.

$query = new Query([
    'query' => new Criterion\MatchAll(),
    'sortClauses' => [
        new SortClause\CustomField('my_custom_field_s'),
    ],
]);

This sort clause is can be used in ad hoc tools and testing but should be avoid in production code.

Checklist:

• Provided PR description.
• Tested the solution manually.
• Provided automated test coverage.
• Checked that target branch is set correctly (master for features, the oldest supported for bugs).
• Ran PHP CS Fixer for new PHP code (use $ composer fix-cs).
• Asked for a review (ping @ezsystems/php-dev-team).

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

No Coverage information
0.0% Duplication