[bitnami/kafka] Adding support for the sasl mechanism, oauthbearer (#19224)

* Added the possibility to add additional Kafka configuration via a
secret. Either via providing name of existing secret, or providing the
value for a secret the chart then creates.

Signed-off-by: Lucas Petersen <lux_-4@hotmail.com>

* Bumping Chart.yaml

Signed-off-by: Lucas Petersen <lux_-4@hotmail.com>

* readme-generator

Signed-off-by: Lucas Petersen <lux_-4@hotmail.com>

* Added support for oauthbearer sasl mechanism

Signed-off-by: Lucas Petersen <lux_-4@hotmail.com>

* minor version bump

Signed-off-by: Lucas Petersen <lux_-4@hotmail.com>

* Fixed small oversight where controller specific sasl credentials wasn't dependent on mechanism

Signed-off-by: Lucas Petersen <lux_-4@hotmail.com>

---------

Signed-off-by: Lucas Petersen <lux_-4@hotmail.com>
Signed-off-by: LuxTheDude <lux_-4@hotmail.com>
Signed-off-by: Jose Antonio Carmona <jcarmona@vmware.com>
Co-authored-by: Jose Antonio Carmona <jcarmona@vmware.com>

bitnami/kafka/Chart.yaml

@@ -42,4 +42,4 @@ maintainers:
 name: kafka
 sources:
 - https://github.com/bitnami/charts/tree/main/bitnami/kafka
-version: 25.2.0
+version: 25.3.0