[iOS][Fabric] Reset keyboard inset state when recycling ScrollViews

[RealBhupesh]

Fixes #57755

Summary

• Keep automaticallyAdjustKeyboardInsets synchronized with the current props on every Fabric ScrollView update.
• Disarm keyboard handling when a view enters the recycle pool.
• Cancel active scroll-view animations and restore both content and vertical indicator insets from the current props.

Root cause

Fabric recycles RCTScrollViewComponentView instances while their keyboard notification observer remains registered. The keyboard opt-in flag and keyboard-managed indicator inset were not reset during recycling, so a later ScrollView could inherit keyboard behavior or an in-flight animation from the previous component.

Changelog:

[IOS] [FIXED] - Prevent keyboard inset state from leaking through recycled Fabric ScrollViews

Test Plan

• ./node_modules/.bin/clang-format --dry-run --Werror packages/react-native/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm
• git diff --check
• ./node_modules/.bin/prettier --list-different "./**/*.{js,md,yml,ts,tsx}"
• iOS native tests were not run locally because this environment has Command Line Tools but not the Xcode app; upstream CI should run the native test matrix.