v2.8.0-M1

Change log:

82f628a Upgrade versions; prepare for release
cf89aee GH-615: Add CommonLoggingErrorHandler
8e5c5a7 GH-1870: Fix Doc for Programmatic JSON Config
cd661dc GH-615: Error Handler Evolution Part 1
2cab170 Sonar Fixes
1875a6c GH-1866: Fix Race in Tests
ccb8b80 GH-1866: Fix Pause/Resume
e29ec92 GH-1863 - Configure listener error handler and type converter for @RetryableTopics
c0303d3 GH-1861: Add KafkaTemplate.receive()
f7046d7 GH-1189: Clear offsetsInThisBatch on nack()
ff35062 GH-1189: Support Out-of-Order Manual Commits
c1854a2 GH-1858: Fix Regression in JsonDeserializer
cd7607b Suppress Deprecation Warnings in Tests
267738c Fix new Sonar issues
3a31b3c Switch main branch to 2.8
c34eb76 GH-1855: Fix Call to RetryingBatchErrorHandler
23f0404 GH-1827: Fix What's New Link
c474bca GH-1852: Fix Incorrect Kotlin Dependency
eab4a67 GH-1843: Delegating EH - use isAssignable()
df92ec5 Fix Race in Tests
febd8ee GH-1784: Customizing JSON Serializer/Deserializer
1f11735 GH-1800: Add KafkaNullAwarePayloadArgumentResolver
f173887 GH-1845: Use stoppableSleep() for Authz Sleeps
ce298f5 GH-1845: Idle Between Polls Improvements
8bcb052 GH-1842: Add Conditional Delegating Error Handlers