Update test and metadata locations for iText Core modules and iText add-ons

[vitali-pr]

What does this PR do?

This PR updates test and metadata locations for iText Core modules and adds iText pdfHtml to the list of tested libraries and frameworks.

Code sections where the PR accesses files, network, docker or some external service

Checklist before merging

• I have considered including reachability metadata directly in the library or the framework (see our contributing document)
• I am the original author of all content provided in the pull request, and I did not copy the content from any other source (see the tests section from our contributing document)
• For all tests where I am not the sole author, I have added a comment that proves I may publish them under the specified license (see the tests section from our contributing document)
• I have properly formatted metadata files (see our formatting guide)
• I have added thorough tests (see the tests section from our contributing document)
• I have filled all places where my pull request accesses files, network, docker, or any other external service (see the section above)

[fniephaus]

LGTM, thanks for the updates!

[fniephaus]

The check probably failed because the entries are not in order. Could you please make sure they are sorted alphabetically by artifact name?

[vitali-pr]

The check probably failed because the entries are not in order. Could you please make sure they are sorted alphabetically by artifact name?

I've checked and they are sorted. There was 1 extra newline comparing to 'jq -s '.[] | sort_by(.artifact)' ./library-and-framework-list.json' result. Could it be the reason? Removed it.

[fniephaus]

Could it be the reason? Removed it

Looks like it. Thanks for fixing!