Fix build issues: 1 clean non-exists target dirs; 2 remove duplicated plugin

[res-life]

This fixes #4445
1 clean non-exists target dirs;
2 fix warnning a warnning duplicated plugin

Signed-off-by: Chong Gao res_life@163.com

[res-life]

Use "rm -rf" instead of "rm -r".
"rf" option can handle the following paths without "sort", no need to remove the deeply subdir first.

target/a
target/a/target
target/a/target/b
target/a/target/b/target
target/a/target/b/target/c
target/a/target/b/target/c/target
target/a/target/b/target/c/target/bb
target/a/target/b/target/c/target/bb/target

BTW: Remove a dupilcated plugin to remove warning message:

$ mvn clean package -DskipTests
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for com.nvidia:rapids-4-spark-sql_2.12:jar:22.02.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.(groupId:artifactId)' must be unique but found duplicate declaration of plugin org.codehaus.mojo:build-helper-maven-plugin @ line 386, column 21
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 
[INFO] ------------------------------------------------------------------------

[res-life]

build