fix: upgrade testcontainers to 2.0.x for Docker 29 compatibility

Docker 29.0.0 increased the minimum API version from 1.24 to 1.44,
breaking testcontainers 1.x which only supports API version 1.32.

Upgrades:
- testcontainers: 1.20.3 -> 2.0.3
- kindcontainer: 1.4.9 -> 2.0.0

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: manusa

pom.xml

@@ -68,8 +68,8 @@
     <version.maven-source-plugin>3.4.0</version.maven-source-plugin>
     <version.maven-surefire-plugin>3.5.4</version.maven-surefire-plugin>
     <version.slf4j>2.0.17</version.slf4j>
-    <version.test-containers>1.20.3</version.test-containers>
-    <version.test-containers-kind>1.4.9</version.test-containers-kind>
+    <version.test-containers>2.0.3</version.test-containers>
+    <version.test-containers-kind>2.0.0</version.test-containers-kind>
   </properties>
 
   <modules>