Improve generated overloads

The initial batch of bindings was generated. Some methods have generated overloads.
We should try and improve these manually.
Either via:

• Renaming to hold a more suitable underscore suffix. (See addEventListener as example)
• Remove some of these overloads if they don't make sense. (Like setTimeout taking a string as argument).

src/Global.res

• setTimeout2
• setInterval2
• createImageBitmap18
• alert2
• postMessage2
• scroll2
• scrollTo2
• scrollBy2

src/CanvasAPI/Path2D.res

• make2
• roundRect3

src/IndexedDBAPI/IDBObjectStore.res

• createIndex2

src/IndexedDBAPI/IDBDatabase.res

• transaction2

src/DOMAPI/HTMLInputElement.res

• setRangeText2

src/DOMAPI/Element.res

• after2
• animate2
• append2
• before2
• prepend2
• replaceChildren2
• replaceWith2
• scroll2
• scrollBy2
• scrollTo2

src/DOMAPI/DOMMatrixReadOnly.res

• make2

src/DOMAPI/HTMLCanvasElement.res

• getContext_WebGL2

src/DOMAPI/VideoFrame.res

• make10
• copyTo3

src/DOMAPI/HTMLTextAreaElement.res

• setRangeText2

src/DOMAPI/Navigator.res

• sendBeacon7
• vibrate2

src/DOMAPI/Document.res

• prepend2
• append2
• replaceChildren2
• createElement2
• createElementNS2
• open2

src/DOMAPI/CanvasRenderingContext2D.res

• setTransform2
• createPattern7
• fill2
• stroke2
• clip2
• isPointInPath2
• isPointInStroke2
• drawFocusIfNeeded2
• drawImage21
• createImageData2
• putImageData2
• roundRect3

src/DOMAPI/DOMMatrix.res

• make2

src/DOMAPI/HTMLSlotElement.res

• assign2

src/DOMAPI/Window.res

• setTimeout2
• setInterval2
• createImageBitmap18
• alert2
• postMessage2
• scroll2
• scrollTo2
• scrollBy2

src/DOMAPI/CharacterData.res

• after2
• before2
• replaceWith2

src/DOMAPI/ImageData.res

• make2

src/DOMAPI/DocumentFragment.res

• append2
• prepend2
• replaceChildren2

src/DOMAPI/StylePropertyMap.res

• set2
• append2

src/DOMAPI/HTMLSelectElement.res

• removeH2

src/CSSFontLoadingAPI/FontFace.res

• make3

src/WebSocketsAPI/WebSocket.res

• make2
• send4

src/WebLocksAPI/LockManager.res

• request2

src/EncryptedMediaExtensionsAPI/MediaKeys.res

• setServerCertificate2

src/EncryptedMediaExtensionsAPI/MediaKeySession.res

• generateRequest2
• update2

src/EncryptedMediaExtensionsAPI/MediaKeyStatusMap.res

• has2

src/ChannelMessagingAPI/MessagePort.res

• postMessage2

src/FetchAPI/FormData.res

• append2
• get2
• set2

src/FetchAPI/Headers.res

• make2

src/FetchAPI/Request.res

• make2

src/FetchAPI/Response.res

• make7

src/FetchAPI/URLSearchParams.res

• make3

src/PerformanceAPI/Performance.res

• measure2

src/ServiceWorkerAPI/Cache.res

• match2
• matchAll2
• add2
• put2
• delete2
• keys2

src/ServiceWorkerAPI/ServiceWorker.res

• postMessage2

src/ServiceWorkerAPI/CacheStorage.res

• match2

src/FileAPI/ReadableStream.res

• make3

src/FileAPI/FileSystemWritableFileStream.res

• write5

src/MediaCaptureAndStreamsAPI/MediaStream.res

• make3

src/WebAudioAPI/OfflineAudioContext.res

• make2

src/WebCryptoAPI/SubtleCrypto.res

• generateKey2
• deriveBits2
• wrapKey2

src/UIEventsAPI/DataTransferItemList.res

• add2

Start with the listed generated files under src/, using Global.res and DOMAPI/Element.res as initial examples. Compare the addEventListener and setTimeout API references, then review each checked-off overload for a suitable suffix or removal; done means the checklist decisions are applied consistently across the affected bindings.