55.2.0-rc1: [branch-55] chore: update version 55.2.0 and add changelog (#26037)
Which issue does this PR close? Part of #25758. Rationale for this change Prepare the 55.2.0 patch release. What changes are included in this PR? Bumps the version to 55.2.0 in Cargo.toml, Cargo.lock and the docs, and adds dev/changelog/55.2.0.md. What is the testing strategy for this PR? No code changes. The changelog comes from dev/release/generate-changelog.py. Are there any user-facing changes…