[cleanup][io] Remove useless kafka server dep in debezium sources

[nicoloboschi]

Motivation

Pulsar IO debezium sources depends on kafka (the whole server) but it only actually needs kafka-connect framework.

Modifications

• Removed kafka dependency from debezium-core and all the related dependencies (scala)

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Fork pull: nicoloboschi#42

[tisonkun]

/pulsarbot run-failure-checks

[codecov-commenter]

Codecov Report

Merging #18956 (6f7833c) into master (3011946) will decrease coverage by 1.80%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master   #18956      +/-   ##
============================================
- Coverage     46.75%   44.94%   -1.81%     
- Complexity    10514    10782     +268     
============================================
  Files           703      763      +60     
  Lines         68858    73615    +4757     
  Branches       7383     7916     +533     
============================================
+ Hits          32193    33085     +892     
- Misses        33065    36813    +3748     
- Partials       3600     3717     +117     

Flag	Coverage Δ
unittests	44.94% <ø> (-1.81%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...java/org/apache/pulsar/proxy/stats/TopicStats.java	58.82% <0.00%> (-41.18%)	⬇️
.../apache/pulsar/broker/loadbalance/LoadManager.java	61.11% <0.00%> (-16.67%)	⬇️
...tent/PersistentDispatcherSingleActiveConsumer.java	55.17% <0.00%> (-8.78%)	⬇️
...pulsar/broker/service/PulsarCommandSenderImpl.java	73.84% <0.00%> (-4.62%)	⬇️
...ervice/AbstractDispatcherSingleActiveConsumer.java	69.15% <0.00%> (-1.87%)	⬇️
...g/apache/pulsar/broker/lookup/TopicLookupBase.java	53.63% <0.00%> (-1.68%)	⬇️
...g/apache/pulsar/broker/admin/impl/BrokersBase.java	60.45% <0.00%> (-1.37%)	⬇️
...va/org/apache/pulsar/broker/service/ServerCnx.java	48.80% <0.00%> (-1.15%)	⬇️
...ice/persistent/PersistentMessageExpiryMonitor.java	43.75% <0.00%> (-1.05%)	⬇️
...a/org/apache/pulsar/proxy/server/ProxyService.java	80.00% <0.00%> (-0.94%)	⬇️
... and 77 more