Add proto-schema-compatibility-maven-plugin check against release/26.0 branch to main

Closes #33565

Signed-off-by: Ryan Emerson <remerson@redhat.com>

model/infinispan/pom.xml

@@ -106,6 +106,9 @@
                         </goals>
                     </execution>
                 </executions>
+                <configuration>
+                    <remoteLockFiles>https://raw.githubusercontent.com/keycloak/keycloak/refs/heads/release/26.0/model/infinispan/proto.lock</remoteLockFiles>
+                </configuration>
             </plugin>
         </plugins>
     </build>

pom.xml

@@ -98,6 +98,8 @@
         <infinispan.version>15.0.8.Final</infinispan.version>
         <!-- version number is needed for the proto-schema-compatibility-maven-plugin and needs to be in-sync with the version used in Infinispan -->
         <protostream.version>5.0.8.Final</protostream.version>
+        <!-- protostream.plugin.version property can be replaced with protostream.version once protostream.version >= 5.0.10.Final -->
+        <protostream.plugin.version>5.0.10.Final</protostream.plugin.version>
 
         <!--JAKARTA-->
         <jakarta.mail.version>2.1.1</jakarta.mail.version>
@@ -1559,7 +1561,7 @@
                 <plugin>
                     <groupId>org.infinispan.protostream</groupId>
                     <artifactId>proto-schema-compatibility-maven-plugin</artifactId>
-                    <version>${protostream.version}</version>
+                    <version>${protostream.plugin.version}</version>
                     <configuration>
                         <commitProtoLock>${commitProtoLockChanges}</commitProtoLock>
                     </configuration>