Use racially neutral terms in codebase

[mimaison]

Problem

Some configurations and many variables throughout the code base use racially charged terms.

Solution

• Introduce new configurations. Existing configurations using racially charged terms are marked as deprecated.
• Update variables to use racially neutral terms only.

Does this solution apply anywhere else?

N/A

Test Strategy

Updated existing tests + added some new for logic handling new configurations.

Testing done:

• [x] Unit tests
• [ ] Integration tests: I tried running them but they all fail:

[ERROR] io.confluent.connect.jdbc.source.integration.MySQLOOMIT.testStreamingReads  Time elapsed: 0.902 s  <<< ERROR!
ch.vorburger.exec.ManagedProcessException: An error occurred while installing the database
[ERROR] io.confluent.connect.jdbc.source.integration.PostgresOOMIT.testTableLocksWithStreamingReads  Time elapsed: 0.154 s  <<< ERROR!
java.lang.IllegalStateException: Process [/var/folders/6f/c4r3kvwd76l9c0k_59qzh_r00000gn/T/embedded-pg/PG-2c0c4f55a015ab253337e3d05ca5fd21/bin/initdb, -A, trust, -U, postgres, -D, /var/folders/6f/c4r3kvwd76l9c0k_59qzh_r00000gn/T/epg3642288202649490811, -E, UTF-8] failed
[ERROR] io.confluent.connect.jdbc.source.integration.PostgresOOMIT.testStreamingReads  Time elapsed: 0.011 s  <<< ERROR!
java.lang.IllegalStateException: Process [/var/folders/6f/c4r3kvwd76l9c0k_59qzh_r00000gn/T/embedded-pg/PG-2c0c4f55a015ab253337e3d05ca5fd21/bin/initdb, -A, trust, -U, postgres, -D, /var/folders/6f/c4r3kvwd76l9c0k_59qzh_r00000gn/T/epg8522825206449835467, -E, UTF-8] failed

• [ ] System tests
• [ ] Manual tests

Release Plan

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[mimaison]

I'm not going to sign the CLA, so closing this PR