Remove isExperimentalBuild Checks in Classic Template Block (#8902)

* Remove isExperimentalBuild checks.

By removing the `isExperimentalBuild` conditional checks in the Classic
Template block, we can ensure the features added in #8324 will land in
WooCommerce Core and are not limited to the feature plugin.

See p1680000654295729-slack-C02UBB1EPEF for additional context.

* Revert isExperimentalBuild removal on registration

The conditional `isExperimentalBuild` conditional check that was
wrapping some conditional registration of the classic template
block seems to be  unrelated to the template conversion/migration.

This is something we can revisit and test separately but should not be
included in this changeset.

Author: danielwrobert

assets/js/blocks/classic-template/index.tsx

@@ -89,7 +89,7 @@ const Edit = ( {
 		getButtonLabel,
 	} = conversionConfig[ templateType ];
 
-	const canConvert = isExperimentalBuild() && isConversionPossible();
+	const canConvert = isConversionPossible();
 	const placeholderDescription = getDescription( templateTitle, canConvert );
 
 	return (