Backport to branch(3) : Remove deprecated API usages (Part 1)

[feeblefakie]

This is an automated backport of the following:

• Original PR: Remove deprecated API usages (Part 1) #2947
• Backported commit: a09a04a

Please merge this PR after all checks have passed.

[gemini-code-assist]

Summary of Changes

Hello @feeblefakie, 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 is an automated backport aimed at modernizing the codebase by removing deprecated API usages across various modules. The primary impact is to update Key object instantiations, Scan.Ordering creations, and MutationCondition constructions to use newer, recommended factory methods and builders, ensuring compatibility and adherence to updated API guidelines.

Highlights

• Key Constructor Replacement: Replaced direct Key constructors with static factory methods like Key.ofInt, Key.ofText, Key.ofBlob, and Key.of for improved clarity and type safety.
• Conditional Expression Modernization: Updated ConditionalExpression.getName() calls to ConditionalExpression.getColumn().getName() to align with the revised column naming conventions.
• Scan Ordering Factory Methods: Switched from new Scan.Ordering() to Scan.Ordering.asc() and Scan.Ordering.desc() for creating scan orderings.
• Mutation Condition Builder Adoption: Replaced direct instantiations of PutIfNotExists, PutIfExists, DeleteIfExists, PutIf, and DeleteIf with their respective ConditionBuilder factory methods.

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[gemini-code-assist]

Code Review

This pull request is a backport that removes deprecated API usages throughout the codebase. The changes are extensive and consistently apply modern, more readable APIs, such as factory methods for Key and Scan.Ordering, and builders for conditions. This is a great improvement for maintainability. I've found a couple of issues in SnapshotTest.java where the refactoring seems to have inadvertently altered the test logic by changing key values. My review includes suggestions to fix these issues.