v2.7.0-M2

Change log:

3d727a5 Fix Javadoc Typo
983c944 Upgrade versions; prepare for release
b2b2262 (origin/sonar, sonar) Resolve new Sonar Issues
777a930 Skip Sonarqube for spring-kafka-docs
257bff5 GH-920: - More enhancements
1a2f671 GH 920 - Topic-based retry support (#1664)
074f991 GH-1700: Reduce Method Complexity
bdd9ee8 GH-1700: Check Partition in DLPublishingRecoverer
8995e4d GH-1699: Deprecate ChainedKafkaTransactionManager
92a2c9b GH-1700: Highlight Config of Default Dest Resolver
c75d244 Verify Doc Code Snippets Compile
e718ac0 Fix Missing Links in Docs
a58063c Upgrade Boot Version in Samples; Fix Tests
6fed87b Fix previous commit
10cb5e4 Sonar: Fix Nullable on Possibly null Parameters
9dbd0e5 Improve Sonar and Jacoco plugin configurations
f2f54ca GH-1681: Add "after" methods to RecordInterceptor
8879427 GH-1678: Allow CF Property Overrides
9101166 GH-1693: Use concatMap in ReactiveKafkaTemplate
5e46e02 GH-1690: Polish Quick Start Docs
a8a4241 GH-1638: Add RetryListener
01e8572 GH-1480: Suppress Sonar issue in deprecated method
d53ec47 GH-1480: "Interruptible" BackOff for shutting down
a7c4768 GH-1688: AckMode Javadoc Polishing
eb39afc Resolve several Sonar reported issues
60618a2 Fix What's New Anchors