fix(input, textarea): clearOnInput ignores key modifiers (#28639)

Issue number: resolves #28633

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## What is the current behavior?
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In https://github.com/ionic-team/ionic-framework/pull/28005 I introduced
a fix that causes "clearOnEdit" to not clear input/textarea when the Tab
key was pressed. However, there were several edge cases I missed. For
instance, pressing the "shift" key and then the "tab" key would still
clear the input because "shift" was not explicitly excluded.

## What is the new behavior?
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this PR. -->

- Input and textarea now explicitly ignores modifier keys that do not
change the value of the input
- `didInputClearOnEdit` is not set to `true` when an ignored key is
pressed. Otherwise, pressing an ignored key and then an accepted key
would not cause the input to be cleared. For example, pressing "shift",
releasing "shift", then pressing "A" should cause the input to still get
cleared.
- Added test coverage

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

Playwright bug report for
https://github.com/ionic-team/ionic-framework/pull/28639/commits/a9f34a54f1bf5b7dfdc1401f5a339f55c4b9093b:
https://github.com/microsoft/playwright/issues/28495