Move shaded libraries to be external dependencies

[nvoxland]

Description

Liquibase currently shades the following libraries into the liquibase.jar file:

• opencsv
• apache commons-lang3
• apache commons-text
• apache commons-collections4
• apache commons-codec
• jsqlparser
• jackson xml libraries

primarily because prior to #2850 it was difficult to manage external dependencies in the CLI.

Now that that issue has been lessened, we can manage those dependencies in a more standard manner.

Expected Results

• No shaded classes in liquibase.jar
• Libraries are included in the CLI's internal/lib directory
• org.liquibase:liquibase-core's pom.xml includes them as non-optional dependencies