Migrate to Jakarta EE 9

[mp911de]

Tickets from other modules:

• Cassandra Migrate to Jakarta EE 9 spring-data-cassandra#1169
• Couchbase (tbd)
• Elasticsearch (tbd)
• Envers (not applicable, to be merged with JPA)
• Geode Upgrade to Jakarta EE 9 spring-attic/spring-data-geode#539
• JDBC (not applicable)
• JPA Migrate to Jakarta EE 9 spring-data-jpa#2305
• LDAP Migrate to Jakarta EE 9 spring-data-ldap#281
• MongoDB Migrate to Jakarta EE 9 spring-data-mongodb#3830
• Neo4j (tbd)
• R2DBC (to be merged with Spring Data Relational (JDBC))
• Redis Migrate to Jakarta EE 9 spring-data-redis#2172
• REST Migrate to Jakarta EE 9 spring-data-rest#2067

[mp911de]

Easy to miss: javax.enterprise.inject.spi.Extension service loader metadata must be renamed to jakarta.enterprise.inject.spi.Extension.