Enable the 340 shim test

[firestarman]

fixes #7676

Verified the test locally and it can pass now, so it is ok to enable the 340 shim test.

$ mvn test -pl sql-plugin   -Dsuites=com.nvidia.spark.rapids.shims.spark340.SparkShimsSuite   -Dbuildver=340
...
[INFO] 
[INFO] --- scalatest-maven-plugin:2.0.2:test (test) @ rapids-4-spark-sql_2.12 ---
Run starting. Expected test count is: 2
com.nvidia.spark.rapids.shims.spark340.SparkShimsSuite:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
- spark shims version
- shuffle manager class
Run completed in 219 milliseconds.
Total number of tests run: 2
Suites: completed 1, aborted 0
Tests: succeeded 2, failed 0, canceled 0, ignored 0, pending 0
All tests passed.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  13.321 s
[INFO] Finished at: 2023-07-11T09:13:34Z
[INFO] ------------------------------------------------------------------------

[firestarman]

build