feat: Add Db2 binary types to supported types

[nj1973]

Description of changes

Adds support for binary data types as below:

• Row validation of BINARY/VARBINARY via to_hex operation matching other engines
• Random row validation on binary PKs now supported using to/from hex matching other engines
• Column validation supported for BINARY/VARBINARY
• BLOB columns are skipped for row validation due to being incompatible with concatenation and hex. This has been documented as a limitation.
• This PR does not add BINARY/VARBINARY columns to the dvt_db2_types test table because the Db2 test instance is not versioned and adding the columns for this PR would break tests on other branches. This is because the mere presence of the columns fails during initial load of the table schema in Ibis.
• Once this has been merged we can add BINARY/VARBINARY columns to dvt_db2_types as part of a future Db2 change (there are plenty in the pipeline).
• I've excluded FOR BIT DATA data types from the PR because they are a whole adventure in themselves and I didn't want to make this change take too long.

Issues to be closed

Closes #1354

Checklist

• I have followed the CONTRIBUTING Guide.
• I have commented my code, particularly in hard-to-understand areas
• I have updated any relevant documentation to reflect my changes, if applicable
• I have added unit and/or integration tests relevant to my change as needed
• I have already checked locally that all unit tests and linting are passing (use the tests/local_check.sh script)
• I have manually executed end-to-end testing (E2E) with the affected databases/engines

[nj1973]

/gcbrun

[nj1973]

/gcbrun