v6.2.0-RC1

Change log:

e933d63 Fix PostgresSubscribableChannel race condition
bb908d8 Upgrade dependencies; prepare for release
bdefd8a Deprecate spring-integration-security module
87a2ac5 GH-8760 Postgres: using DELETE ... RETURNING
29186e2 GH-8757: Add nullabilty to .support.converter
6909fbe Fix race condition in GatewayInterfaceTests
ea8d917 Code clean up for UUIDConverter
77d8dfd Streamline UUIDConverter
25630f5 GH-8734: expose JmsLisConSpec.observationRegistry (#8764)
f89ca99 Reduce log noise for AbstractCorrelatingMH
f819f4b Upgrade to mongoDB 4.11.0
7169215 Upgrade to Hibernate 6.3.1; Cleanup in JPA module
ea3e118 Remove request FILENAME header for MPUT (#8761)
ce4ce74 Some code clean up for RemoteFileOutboundGateway
44433ed GH-8745: Add RFT.shouldMarkSessionAsDirty() (#8759)
b822853 Optimize updateCopyrights Gradle task
0203652 Move Spring dependencies to SNAPSHOT
49cd14c GH-8750: Add @Nullable to getRegistrationById()
75fcdda GH-8754: MessageBuilder: enhance @Nullable
098ba3e Publish Gradle module artifacts (#8752)
af609ca Change the default polling trigger to 1 second (#8751)
fa06940 GH-8748: JDBC locks: use READ_COMMITTED isolation (#8749)
ad01c44 Fix maxMessagesPerPoll for SourcePollingChAdapter (#8747)