[1.x] Pre-release tidy-up (#1010)

Changes:
* no source changes
* (build) expel all versions from child modules: they must be all top level depMgmt or pluginMgmt
* (build) Top POM contains GAVs while child modules GA+scope. This tremendously simplifies maintenance.
* (javadoc) fix Javadoc errors

Updates:
* use latest Maven 3.9.8-SNAPSHOT (TS locked version, controlled deploy by me)
* AssertJ 3.26.0
* Takari Smart Builder 0.6.6
* Sisu 0.9.0.M3
* maven wrapper 3.3.2 w/ scripts

This brings mvnd-1.x in "releasable" state (once Maven 3.9.8 is out).

native/pom.xml

@@ -28,10 +28,6 @@
   <packaging>jar</packaging>
   <name>Maven Daemon - Native Library</name>
 
-  <properties>
-    <picocli.version>4.7.6</picocli.version>
-  </properties>
-
   <dependencies>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
@@ -46,7 +42,6 @@
     <dependency>
       <groupId>info.picocli</groupId>
       <artifactId>picocli-codegen</artifactId>
-      <version>${picocli.version}</version>
       <scope>test</scope>
     </dependency>
   </dependencies>