[DEV-9587] missing backrefs

[Boris-Filin]

Description

Add backfill for lists that have one in JVM;

Add collection backfill tests mirroring java

• [DEV-9588] Unify tests to use validateBackfill; add missing checks for cuts and clamps ewb-sdk-jvm#276

Associated tasks

• [DEV-9588] Unify tests to use validateBackfill; add missing checks for cuts and clamps ewb-sdk-jvm#276

Test Steps

Run tests lol

Checklist

If any of these are not applicable, strikethrough the line ~like this~. Do not delete it!. Let the reviewer decide if you should have done it.

Code

• I have performed a self review of my own code (including checking issues raised when creating the PR).
• I have added/updated unit tests for these changes, and if not I have explained why they are not necessary.
• I have commented my code in any hard-to-understand or hacky areas.
• I have handled all new warnings generated by the compiler or IDE.
• I have rebased onto the target branch (usually main).

Security

When developing applications, use following guidelines for information security considerations:

• Access to applications should be protected with security keys/tokens or usernames and passwords;
• All sessions are encrypted if possible;
• All application input is sanitised before being acted on (ie SQL statements, etc);
• Log messages, and especially client-facing ones, must be handled securely and must not leak credentials information (internal URLs, passwords, tokens).

• I have considered if this change impacts information security and made sure those impacts are handled.

Documentation

• I have updated the changelog.
• I have updated any documentation required for these changes.

Breaking Changes

• I have considered if this is a breaking change and will communicate it with other team members by posting it on the Slack breaking-changes channel.

Please leave a summary of the breaking changes here and then post it on the Slack breaking-changes channel to notify the team about it.

[charlta]

Marked as draft pending outcomes of the review on zepben/ewb-sdk-jvm#276

The tests here can likely be updated to match.

[charlta]

Can you please add appropriate change log entries for new backref functionality, noting the breaking requires checks

[Boris-Filin]

Re-rebased onto main to reflect latest changes