[AAE-5392] - Make search text input more configurable & add an event … (#7188)

* [AAE-5392] - Make search text input more configurable & add an event emitter to indicate the states of it

* Remove fdescribe

* Emit empty search term when the search gets cleared

* Emit the empty search term when the search gets collapsed by the Search icon

* Same onBlur, emit the empty search term

* Add unit tests for emitters resetting the search term

* Fix comments, use reset event emitter instead of emitting an empty search term

* Update documentation

* Revert reset to boolean

* Fix flaky unit test

lib/core/search-text/search-text-input.component.html

@@ -25,6 +25,13 @@
                    (ngModelChange)="inputChange($event)"
                    [searchAutocomplete]="searchAutocomplete ? searchAutocomplete : null"
                    (keyup.enter)="searchSubmit($event)">
+            <button mat-icon-button matSuffix
+                    data-automation-id="adf-clear-search-button"
+                    class="adf-clear-search-button"
+                    *ngIf="canShowClearSearch()"
+                    (mousedown)="resetSearch()">
+                <mat-icon>clear</mat-icon>
+            </button>
         </mat-form-field>
     </div>
-</div> 
+</div>