fix: bring flow dependency as provided in spreadsheet (#8104)

This align dependencies with all other flow components

Author: manolo

vaadin-spreadsheet-flow-parent/vaadin-spreadsheet-flow/pom.xml

@@ -22,10 +22,7 @@
         <dependency>
             <groupId>com.vaadin</groupId>
             <artifactId>flow-html-components</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>com.vaadin</groupId>
-            <artifactId>flow-server</artifactId>
+            <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>com.vaadin</groupId>