HDDS-14105. Require ConfigGroup prefix to be present in Config keys

[adoroszlai]

What changes were proposed in this pull request?

After HDDS-12424, ConfigGroup#prefix can now be included in Config#key, which helps when searching by full config property name. Some new keys were added recently with prefix included. HDDS-14030 added the prefix in all existing config keys to ensure consistent style.

This change proposes to make the prefix mandatory so that we:

• keep this consistent style in future
• avoid typos

For that, we need to remove support for inheriting configuration keys from ancestor classes. In theory this feature would help reuse, applying different prefixes to different subclasses of the same base one. However, this is currently used only in mock configuration classes, which exist for testing the configuration framework. I think descriptions, tags and maybe even default values would need to be different across subclasses, so it does not seem very practical. We can still inherit some implementation for reuse and apply the @Config annotation in the subclass.

Config keys are validated against the prefix at compile time. Sample error when prefix is missing:

[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] hadoop-hdds/config/src/test/java/org/apache/hadoop/hdds/conf/ConfigurationExample.java:[27,8] ozone.test.config. is not a prefix of config.time.duration
[INFO] 1 error

https://issues.apache.org/jira/browse/HDDS-14105

How was this patch tested?

CI:
https://github.com/adoroszlai/ozone/actions/runs/20035584181

[adoroszlai]

Marked as draft to force new CI run even if this is approved. We need to verify if any new config keys added on master in the meantime are valid wrt. this requirement.

[adoroszlai]

@smengcl please take a look