chore: add chagnelog

Author: mgadewoll

packages/eui/changelogs/upcoming/9014.md

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+- Added `EuiFormAppend` and `EuiFormPrepend` components
+- Added support for `type="span"` on `EuiFormLabel` to support using visual-only form labels
+- Updated `EuiFormControlLayout` to use `EuiFormAppend` and `EuiFormPrepend`
+- Updated `EuiAutoRefresh` and `EuiColorPicker` to use `EuiFormPrepend`
+
+**Breaking changes**
+
+- Updated `EuiQuickSelectPopover` in `EuiSuperDatePicker` to use `EuiFormPrepend`. This results in more restricted `buttonProps` as they reflect `EuiFormPrepend` instead of generic `EuiButtonEmpty` props. 
+
+**Bug fixes**
+
+- Updated `EuiColorPicker` to ensure `id` is correctly passed onto the internal `EuiFormControlLayout`