[BUG] databricks 8.2 runtime build failed

[pxLi]

Describe the bug

[2021-09-15T02:02:15.523Z] [INFO] --- scala-maven-plugin:3.4.4:compile (scala-compile-first) @ rapids-4-spark-shims-spark311db_2.12 ---
[2021-09-15T02:02:15.523Z] [INFO] Using incremental compilation
[2021-09-15T02:02:15.523Z] [WARNING] Pruning sources from previous analysis, due to incompatible CompileSetup.
[2021-09-15T02:02:15.523Z] [INFO] Compiling 24 Scala sources to /home/ubuntu/spark-rapids/shims/spark311db/target/classes...
[2021-09-15T02:02:16.444Z] [ERROR] /home/ubuntu/spark-rapids/shims/spark311db/src/main/scala/com/nvidia/spark/rapids/shims/spark311db/Spark311dbShims.scala:26: class Spark311dbShims needs to be abstract, since:
[2021-09-15T02:02:16.445Z] it has 2 unimplemented members.
[2021-09-15T02:02:16.445Z] /** As seen from class Spark311dbShims, the missing signatures are as follows.
[2021-09-15T02:02:16.445Z]  *  For convenience, these are usable as stub implementations.
[2021-09-15T02:02:16.445Z]  */
[2021-09-15T02:02:16.445Z]   def findOperators(plan: org.apache.spark.sql.execution.SparkPlan,predicate: org.apache.spark.sql.execution.SparkPlan => Boolean): Seq[org.apache.spark.sql.execution.SparkPlan] = ???
[2021-09-15T02:02:16.445Z]   def skipAssertIsOnTheGpu(plan: org.apache.spark.sql.execution.SparkPlan): Boolean = ???
[2021-09-15T02:02:16.445Z] 
[2021-09-15T02:02:16.445Z] [ERROR] class Spark311dbShims extends SparkBaseShims {
[2021-09-15T02:02:16.445Z] [ERROR]       ^
[2021-09-15T02:02:16.445Z] [ERROR] one error found
[2021-09-15T02:02:16.445Z] [INFO] ------------------------------------------------------------------------
[2021-09-15T02:02:16.445Z] [INFO] Reactor Summary for RAPIDS Accelerator for Apache Spark Root Project 21.10.0-SNAPSHOT:
[2021-09-15T02:02:16.445Z] [INFO] 
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark Root Project ... SUCCESS [  5.854 s]
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark SQL Plugin ..... SUCCESS [01:02 min]
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark Shuffle Plugin . SUCCESS [  0.981 s]
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark SQL Plugin Shims SUCCESS [  0.386 s]
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark SQL Plugin Spark 3.1.1 Databricks Shim FAILURE [  1.116 s]
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark Scala UDF Plugin SKIPPED
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark Aggregator ..... SKIPPED
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark Distribution ... SKIPPED
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark UDF Examples ... SKIPPED
[2021-09-15T02:02:16.445Z] [INFO] RAPIDS Accelerator for Apache Spark Tests .......... SKIPPED
[2021-09-15T02:02:16.445Z] [INFO] rapids-4-spark-integration-tests_2.12 .............. SKIPPED
[2021-09-15T02:02:16.445Z] [INFO] ------------------------------------------------------------------------
[2021-09-15T02:02:16.445Z] [INFO] BUILD FAILURE
[2021-09-15T02:02:16.445Z] [INFO] ------------------------------------------------------------------------
[2021-09-15T02:02:16.445Z] [INFO] Total time:  01:10 min
[2021-09-15T02:02:16.445Z] [INFO] Finished at: 2021-09-15T02:03:40Z
[2021-09-15T02:02:16.445Z] [INFO] ------------------------------------------------------------------------
[2021-09-15T02:02:16.445Z] [ERROR] Failed to execute goal net.alchim31.maven:scala-maven-plugin:3.4.4:compile (scala-compile-first) on project rapids-4-spark-shims-spark311db_2.12: Execution scala-compile-first of goal net.alchim31.maven:scala-maven-plugin:3.4.4:compile failed. CompileFailed -> [Help 1]

[tgravescs]

likely introduced by #3377. looks like add 301db but not 311db shim