* Bump up gRPC/protobuf to fix CVE-2021-2256

* Fix sort metrics failured in H2 storage

* Fix postgre DB

Upgrade maven-wrapper to 3.1.0, maven to 3.8.4 for performance improvements and ARM more native support (#8320)

* Fix license.

* Remove log4j version properties.

* Fix change log.

Fix potential NPE in OAL string match and a bug when right-hand-side variable includes double quotes (#8234)

Ref https://github.com/apache/skywalking/discussions/8204

Signed-off-by: NMarc Navarro Sonnenfeld <marcnavarro@tetrate.io>

Support Apache IoTDB as a storage option, mostly refer to previous InfluxDB storage option.
* The Design of Apache IoTDB Storage Option, https://skywalking.apache.org/blog/2021-11-23-design-of-iotdb-storage-option/

Upgrade to the latest grpc-java 1.42.1 which is only compatible and [tested against](https://github.com/grpc/grpc-java/pull/8551#discussion_r714182190) 3.17.2, but we can assume that 3.17.3 (which has osx-aarch_64 compatible maven artifacts) is save to use.

We could have also upgrade to the latest grpc-java 1.42.1 and latest protoc 3.19.1, but it can not be directly done, it needs to tweak the grpcs-java internal dependencies. So we choose the safest option and discarded this option because of the following reasons:
 - Protoc 3.19.1 generates code that relies on methods not available in protobuf-java 3.17.2 ([“issue”](https://github.com/protocolbuffers/protobuf/issues/9236#issue-1059594027)) (which java-grpc relies on). So we need to tell grpc-java via dependency management to use 3.19.1 instead of 3.17.2.
Signed-off-by: NMarc Navarro Sonnenfeld <marcnavarro@tetrate.io>