Fix DesktopTextInputService2.commitEventWorkaroundShouldIgnoreEvent

[m-sasha]

Implement it more surgically by comparing the composition with the committed text.

Note that this breaks the case of focus moving from a Swing text field to a Compose text field (with an ongoing composition) in Corretto (but not JBR, because of InputMethodEndCompositionWorkaround).
However, because this is a relatively less frequent case than the one reported in CMP-8384, we'll have to live with it.

Fixes https://youtrack.jetbrains.com/issue/CMP-8384

Testing

Tested manually, and added a unit test.

Release Notes

Fixes - Desktop

• Fixed the case when the IME's first event to a text field is to commit a composition.