Replaces the Custom Color Picker on TSVB with the EuiColorPicker (#68888)

* Replace the Custom Color Picker on TSVB with the EuiColorPicker

* Remove the custom picker sass

* Remove private modules of eui and the custom color swatches

* Clear the color

* changes in test implementation

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: stratoula

src/plugins/vis_type_timeseries/public/application/components/_color_picker.scss

@@ -8,39 +8,6 @@
   position: relative;
 }
 
-.tvbColorPicker__swatch-empty,
-.tvbColorPicker__swatch {
-  // SASSTODO: Replace with EUI component
-  // sass-lint:disable-block placeholder-in-extend
-  @extend .euiColorPickerSwatch;
-}
-
-.tvbColorPicker__swatch-empty {
-  background-color: transparent;
-  background-size: 22px 22px;
-  background-image: repeating-linear-gradient(
-    -45deg,
-    $euiColorDanger,
-    $euiColorDanger 2px,
-    transparent 2px,
-    transparent $euiSize
-  );
-}
-
 .tvbColorPicker__clear {
   margin-left: $euiSizeXS;
 }
-
-.tvbColorPicker__popover {
-  position: absolute;
-  top: $euiSizeL;
-  z-index: 2;
-}
-
-.tvbColorPicker__cover {
-  position: fixed;
-  top: 0;
-  right: 0;
-  left: 0;
-  bottom: 0;
-}

src/plugins/vis_type_timeseries/public/application/components/_custom_color_picker.scss

@@ -1,7 +1,6 @@
 @import './annotations_editor';
 @import './color_rules';
 @import './color_picker';
-@import './custom_color_picker';
 @import './error';
 @import './no_data';
 @import './markdown_editor';