* [maven-release-plugin] prepare release v9.2.0

* [maven-release-plugin] prepare for next development iteration

* Create changes-9.2.0.md

* Update changes.md

* Update LICENSE

* [maven-release-plugin] prepare release v9.1.0

* [maven-release-plugin] prepare for next development iteration

* Remove InfluxDB 1.x and Apache IoTDB as storage options.

* Update dependencies.

* Upgrade OAP dependencies zipkin to 2.23.16, H2 to 2.1.212, Apache Freemarker to 2.3.31, gRPC-java 1.46.0, netty to 4.1.76.
* Upgrade Webapp dependencies, spring-cloud-dependencies to 2021.0.2, logback-classic to 1.2.11

Fix Zipkin receiver: Decode spans error, missing `Layer` for V9 and wrong time bucket for generate Service and Endpoint. (#8848)

* Upgrade OAP dependencies gson(2.9.0), guava(31.1), jackson(2.13.2), protobuf-java(3.18.4).
* Remove commons-pool and commons-dbcp from OAP dependencies(Not used before).
* Upgrade webapp dependencies gson(2.9.0), spring boot(2.6.5), jackson(2.13.2.2), spring cloud(2021.0.1).

* Fix IoTDB Storage Option insert null index value.

* Set the default value of SW_STORAGE_IOTDB_SESSIONPOOL_SIZE to 8

* Bump up iotdb-session to 0.12.4

* Update doc

* Fix CVE-2022-23221

H2 Console before 2.1.210 allows remote attackers to execute arbitrary code via a jdbc:h2:mem JDBC URL containing the IGNORE_UNKNOWN_SETTINGS=TRUE;FORBID_CREATION=FALSE;INIT=RUNSCRIPT substring
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

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

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>

* [maven-release-plugin] prepare release v8.8.0

* [maven-release-plugin] prepare for next development iteration

* Create changes-8.8.0.md

* Reset changelog for 8.9.0