Add multiple kerberos authentication environment adaptation

[d6blju]

Added a new configuration option sasl.kerberos.krb5path to adapt to the problem of using multiple krb5 files and different cache files when multiple different kerberos authentication environments are used

[cla-assistant[bot]]

All committers have signed the CLA.

[confluent-cla-assistant[bot]]

:tada: All Contributor License Agreements have been signed. Ready to merge.
:white_check_mark: d6blju
_{Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.}