KAFKA-10787: Apply spotless to raft module

[gongxuanzhang]

This PR is sub PR from #16097.
It is part of a series of changes to progressively apply [spotless plugin(import-order)] across all modules. In this step, the plugin is activated in theraft module.

Module and history

Please see the table below for the historical changes related to applying the Spotless plugin

module	apply	related PR
:clients	❌	future
:connect:api	✅	#16299
:connect:basic-auth-extension	✅	#16299
:connect:file	✅	#16299
:connect:json	✅	#16299
:connect:mirror	✅	#16299
:connect:mirror-client	✅	#16299
:connect:runtime	❌	future
:connect:test-plugins	✅	#16299
:connect:transforms	✅	#16299
:core	❌	future
:examples	✅	#16296
:generator	✅	#16296
:group-coordinator:group-coordinator-api	✅	#16298
:group-coordinator	✅	#16298
:jmh-benchmarks	✅	#16296
:log4j-appender	✅	#16296
:metadata	✅	#16297
:server	✅	#16297
:shell	✅	#16296
:storage	✅	#16297
:storage:storage-api	✅	#16297
:streams	❌	future
:streams:examples	❌	future
:streams:streams-scala	❌	future
:streams:test-utils	❌	future
:streams:upgrade-system-tests-0100	❌	future
:streams:upgrade-system-tests-0101	❌	future
:streams:upgrade-system-tests-0102	❌	future
:streams:upgrade-system-tests-0110	❌	future
:streams:upgrade-system-tests-10	❌	future
:streams:upgrade-system-tests-11	❌	future
:streams:upgrade-system-tests-20	❌	future
:streams:upgrade-system-tests-21	❌	future
:streams:upgrade-system-tests-22	❌	future
:streams:upgrade-system-tests-23	❌	future
:streams:upgrade-system-tests-24	❌	future
:streams:upgrade-system-tests-25	❌	future
:streams:upgrade-system-tests-26	❌	future
:streams:upgrade-system-tests-27	❌	future
:streams:upgrade-system-tests-28	❌	future
:streams:upgrade-system-tests-30	❌	future
:streams:upgrade-system-tests-31	❌	future
:streams:upgrade-system-tests-32	❌	future
:streams:upgrade-system-tests-33	❌	future
:streams:upgrade-system-tests-34	❌	future
:streams:upgrade-system-tests-35	❌	future
:streams:upgrade-system-tests-36	❌	future
:streams:upgrade-system-tests-37	❌	future
:trogdor	✅	#16296
:raft	✅	#16278
:server-common	✅	#16172
:transaction-coordinator	✅	#16172
:tools	✅	#16262
:tools:tools-api	✅	#16262

How to test:

We can run ./gradlew spotlessCheck check for code that does not meet requirements.
If we get report that error , we can run ./gradlew spotlessApply to review my code.
In this PR, all change(exclude build.gradle) byspotlessApply`

[chia7712]

@gongxuanzhang could you please the conflicts? BTW, it would be easy to apply the spotless to small/inactive modules first. For example: log4j-appender, trogdor, jmh-benchmarks, examples, shell, generator

[gongxuanzhang]

@gongxuanzhang could you please the conflicts? BTW, it would be easy to apply the spotless to small/inactive modules first. For example: log4j-appender, trogdor, jmh-benchmarks, examples, shell, generator

Right,next PR will apply all of these modules.

[chia7712]

@gongxuanzhang please rebase code to fix spotless check :)

[chia7712]

@gongxuanzhang you need to fix it again :)

[gongxuanzhang]

@gongxuanzhang you need to fix it again :)

Ok,I'll fix it periodically before merging

[chia7712]

LGTM