HBASE-28906 Run nightly tests with multiple Hadoop 3 versions (#6417)

includes HBASE-28929 Set hadoop-three.version in Hadoop 3 backwards compatibility tests
includes addendum: workaround for MAPREDUCE-7492
includes HBASE-28940 Do not run the backwards compatibility tests with the default Hadoop3 version

Signed-off-by: Nick Dimiduk <[email protected]>
Signed-off-by: Duo Zhang <[email protected]>
(cherry picked from commit 4be7e39)

Author: stoty