chore: replace old java team with cloud-sdk-java-team

[suztomo]

Replace old teams with new ones.
b/479542582

[gemini-code-assist]

Summary of Changes

Hello @suztomo, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the repository's CODEOWNERS file to align with current team structures. The primary goal is to ensure that code changes affecting Java components are correctly routed to the new cloud-sdk-java-team for review and approval, thereby maintaining efficient and accurate code ownership assignments.

Highlights

• CODEOWNERS Update: The .github/CODEOWNERS file has been updated to reflect a change in the designated Java team.
• Team Alias Replacement: The old team alias @googleapis/cloud-java-team-teamsync has been systematically replaced with the new alias @googleapis/cloud-sdk-java-team across all relevant ownership rules.

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[gemini-code-assist]

Code Review

This pull request updates the .github/CODEOWNERS file to replace the old Java team handle @googleapis/cloud-java-team-teamsync with the new one, @googleapis/cloud-sdk-java-team. The change is applied consistently across the file. For the samples/snippets/generated/ path, the @googleapis/yoshi-java team is also removed, consolidating ownership under the new team. The changes are straightforward and align with the stated goal of updating team ownership.