EZP-31912: Fixed decorating image URLs with proper absolute prefix

[alongosz]

Question	Answer
JIRA issue	EZP-31912
Type	bug
Target eZ Platform version	v3.1+
BC breaks	no
Doc needed	ibexa/documentation-developer#1142

This PR fixes decorating image URLs with custom url_prefix.

While the JIRA ticket describes complicated AWS case, in fact URL prefix can be used with local (default) binary handler and it was the part which was broken.

In 2.5 we used to fetch io.url_prefix from dynamic (SiteAccess-aware) configuration for AbsolutePrefix which decorates media URLs.

Since dynamic settings feature was no longer possible due to Symfony 4+ Container changes, we've rewritten the decorating to make the implementation fetch the proper setting.

It seems however that what should be used at the line above is actually getUrlPrefix instead of getLegacyUrlPrefix. See the parameter names fetched by both methods.

TODO:

• See if DI Container test coverage can be added for this case to avoid another regression in the future

Checklist:

• PR description is updated.
• Tests are implemented.
• Added code follows Coding Standards (use $ composer fix-cs).
• PR is ready for a review.

[alongosz]

@ezsystems/documentation-team qualification of "doc needed" changed, but I got you covered there ;)

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

No Coverage information
0.0% Duplication

[micszo]

Retested successfully with single and multi repo setup using io.url_prefix.
Tested on eZ Platform EE v3.1.2 with diff.