Add support for the configuration of micrometer-zabbix.
This can be merged after https://github.com/micrometer-metrics/micrometer/pull/1773 is accepted and a new built version of Micrometer is referenced in https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot-dependencies/build.gradle.
Comment From: wilkinsona
@shakuzen What are your plans for Zabbix support? If things are uncertain I would prefer to close this one as it's unactionable at the moment.
Comment From: snicoll
Closing due to https://github.com/micrometer-metrics/micrometer/pull/1773#issuecomment-823893917