[Func test] Fix ios keyboard_tests

The problem

Failing ios keyboard_tests at functional tests.

https://dev.azure.com/AppiumCI/Appium CI/_build?definitionId=56&_a=summary&view=runs

Environment

See

• https://dev.azure.com/AppiumCI/Appium CI/_build?definitionId=56&_a=summary&view=runs
• https://github.com/appium/python-client/tree/master/ci-jobs

Details

• hide_keyboard works well with Ad v1.19.1 and current functional test codes.
• hide_keyboard doesn’t work well with appium CLI v1.20.0-beta.0 and current functional test codes.
• When the element gone from current view, below code throws Exception.

        el = self.driver.find_element_by_class_name('UIAKeyboard')
        assert el.is_displayed()

        self.driver.hide_keyboard(key_name='Done')

        assert not el.is_displayed()  # Exception occurs

Link to Appium Logs

https://dev.azure.com/AppiumCI/Appium CI/_build?definitionId=56&_a=summary&view=runs

Code To reproduce issue

[mykola-mokhnach]

@ki4070ma I did some local testing and managed to make WDA working properly there: https://github.com/appium/WebDriverAgent/pull/460

Also, the things, that should be changed in the python test itself (and probably other tests from this group):

    def test_hide_keyboard(self) -> None:
        self._move_to_textbox()
       
        
        el = self.driver.find_elements_by_class_name('XCUIElementTypeTextField')[0]
        el.click()
        el.set_value('Testing')

        # The locator should be updated to 'XCUIElementTypeKeyboard'
        el = self.driver.find_element_by_class_name('UIAKeyboard')
        assert el.is_displayed()

        self.driver.hide_keyboard(key_name='Done')

        # Here we don't need nothing, because `hide_keyboard` call throws an exception on its own if the keyboard is still visible
        assert not el.is_displayed()

[mykola-mokhnach]

This is totally fine that tests are executed on beta, since sooner or later these changes will pop up in the next release. It is important to know about possible issues in advance. Thus I appreciate any reports related to the beta version functionality