[sdk-testgen] bump @azure-tools/codegen to 2.10.1

[mikeharder]

• 2.10.1 is actually newer than 3.0.283, which was a preview
• bumps transitive dep "js-yaml"

[Copilot]

Pull request overview

This PR aligns the @azure-tools/codegen dependency in tools/sdk-testgen to the stable 2.10.1 version, removing the previously specified ^3.0.283 which was a preview series. Both @autorest/codemodel and @autorest/extension-base (the main upstream dependencies) already required ~2.10.0 of codegen, so the old 3.x declaration was installing an extra, unnecessary top-level copy that has now been eliminated.

Changes:

• package.json: Downgrades @azure-tools/codegen spec from ^3.0.283 to ^2.10.1 (stable vs. preview).
• package-lock.json: Removes the now-unnecessary @azure-tools/codegen@3.0.283 top-level entry and its exclusive dependencies (@azure-tools/linq, @azure-tools/async-io@4.0.246, @azure-tools/tasks@4.0.246, old js-yaml@3.13.1, semver@5.x), hoisting the shared 2.10.1 packages to the top-level; also updates js-yaml 4.x to 4.1.1 and 3.x to 3.14.2, and hoists retry to the top level.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
tools/sdk-testgen/package.json	Updates @azure-tools/codegen version constraint from ^3.0.283 to ^2.10.1
tools/sdk-testgen/package-lock.json	Removes 3.x codegen and its exclusive transitive deps; consolidates 2.10.1 packages at the top level; updates js-yaml minor patch versions; hoists retry to top level

Files not reviewed (1)

• tools/sdk-testgen/package-lock.json: Language not supported