[CP][ios][text_input_highlight]fix text input system highlight in iOS 17 Beta 7 with firstRectForRange

[hellohuanlin]

original PR: #45303

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flutter/flutter#131622

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[hellohuanlin]

friendly ping :) @stuartmorgan @justinmc

[stuartmorgan-g]

LGTM

[hellohuanlin]

@cyanglaz I think I may need 2 stamps for CP. thanks!