Iterate inheritance chain when searching for PutForwards

[saschanaz]

Fixing the failure:

file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:627
                    throw new Error("Couldn't find [PutForwards]");
                          ^

Error: Couldn't find [PutForwards]
    at emitProperty (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:627:27)
    at file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:677:33
    at Array.forEach (<anonymous>)
    at emitProperties (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:677:18)
    at emitMembers (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:777:9)
    at emitInterface (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:1004:9)
    at emitNonCallbackInterfaces (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:1026:17)
    at emit (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:1113:9)
    at emitWebIdl (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build/emitter.js:147:20)
    at emitFlavor (file:///home/runner/work/TypeScript-DOM-lib-generator/TypeScript-DOM-lib-generator/lib/build.js:34:20)

Node.js v22.16.0

Also a cleanup to remove warning.

In general I would also update the lib here, but I'm deferring that because it's huge (the whole WebGPU is coming 🤯)

[github-actions]

Thanks for the PR!

This section of the codebase is owned by @saschanaz - if they write a comment saying "LGTM" then it will be merged.

[saschanaz]

LGTM

[github-actions]

Merging because @saschanaz is a code-owner of all the changes - thanks!