migrate to javakdb 2.0

[zeddit]

change log:

1. change pom.xml dependency to include javakdb-2.0-BETA-1.
2. change src/main/java/org/uwh/trino/kdb/KDBClient.java and src/main/java/org/uwh/trino/kdb/KDBType.java to import com.kx.c rather than import kx.c because javakdb-2.0 change its groupId.
3. in src/main/java/org/uwh/trino/kdb/KDBTypes.java, change the datatypes related to datetime because javakdb-2.0 change its types.

using mvn clean package -Dmaven.test.skip to build the artifacts.
I tried to migrate the code to support trino-421, but it failed because its quite complicated to setup trino scaffold of new version.

[zeddit]

for trino scaffold of new version. I found a project named trino-plugin-archetype which could create scaffold folder whose url is https://github.com/nineinchnick/trino-plugin-archetype, it manages library dependencies especially the versions, however it's also difficult to setup.

[zeddit]

besides, could you please give me some advices on trino performance optimization for kdb backend. great thanks for your help.