Revert "[bugfix](paimon)upgrade paimon to 0.9" (#42075)

Reverts #41337
paimon 0.9 introduce a breaking change that user can not read bucket
table without bucket key.

fe/pom.xml

@@ -228,7 +228,7 @@ under the License.
         <doris.home>${fe.dir}/../</doris.home>
         <revision>1.2-SNAPSHOT</revision>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <doris.hive.catalog.shade.version>2.1.2</doris.hive.catalog.shade.version>
+        <doris.hive.catalog.shade.version>2.1.1</doris.hive.catalog.shade.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <!--plugin parameters-->
@@ -362,7 +362,7 @@ under the License.
         <quartz.version>2.3.2</quartz.version>
         <aircompressor.version>0.27</aircompressor.version>
         <!-- paimon -->
-        <paimon.version>0.9.0</paimon.version>
+        <paimon.version>0.8.1</paimon.version>
         <disruptor.version>3.4.4</disruptor.version>
         <!-- arrow flight sql -->
         <arrow.vector.classifier>shade-format-flatbuffers</arrow.vector.classifier>