docs(docs-infra): only show clear button of textfield when there is a text (angular#61427)

PR Close angular#61427

Author: JeanMeche

adev/shared-docs/components/text-field/text-field.component.html

@@ -11,7 +11,7 @@
   class="docs-text-field"
 />
 
-@if (resetLabel()) {
+@if (resetLabel() && inputRef.value.length > 0) {
   <button
     type="reset"
     [title]="resetLabel()"