Add missing RootLogger.Builder withFilter alias

[Hashim1999164]

Summary

LoggerConfig.Builder already exposes a deprecated withFilter(Filter) alias next to the misspelled withtFilter(Filter), but LoggerConfig.RootLogger.Builder only had withtFilter. This adds the matching withFilter alias so both builders behave the same way, keeps withtFilter as a deprecated wrapper around setFilter, and adds a small unit test for both call paths.

Fixes #3369

Test plan

• Added LoggerConfigTest.testRootLoggerBuilderWithFilterAlias
• CI LoggerConfigTest on this PR

[ramanathan1504]

@Hashim1999164
Thanks for cleaning up this old typo, and welcome! I ran the tests locally, and it works perfectly. I just pushed a quick commit to your branch to adding Bnd and updated the changelog.

A quick checklist for future PRs:

• Spotless: Read BUILDING.adoc and run ./mvnw spotless:apply.
• Public APIs: If you touch a public API, remember to bump the package version in package-info.java to satisfy the Bnd baseline check.
• Changelog: Keep changelog XML descriptions short and accurate.

Really appreciate your contribution here. LGTM