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>

The ES persistence execution is now asynchronous and the execution
latency only counts the time to insert the requests into the bulk
processor, instead of the time after the requests are flushed into the
storage, this patch fixes that issue.

There is the same issue in prepare latency but that needs more changes
so I'll leave it to another pull request.

* Change `SO11Y` metric `envoy_als_in_count` to calculate the ALS message count.

Optimize metrics of minute dimensionality persistence, don't save metric of being default value. (#8066)

Optimize metrics of minute dimensionality persistence.
- The value of metrics, which has declaration of the default value and current value equals the default value logically, the whole row wouldn't be pushed into database.
- Add self-observability `metrics_persistence_skipped` metric to measure the number of skipped metrics.
- SLA(percent function), Apdex, AvgLong(MAL mostly) metrics are mostly optimized because of this. Such as a full-failing error(0% successful rate) and unhealthy(apdex=0) are not costing the storage.
- Hour/Day dimensionalities metrics are not changed, as they cover long duration.
- Fix `max` function in OAL doesn't support negative long.

1. Remove general receiver and fetcher docs
1. Add more specific menu with docs to help users to find documents easier.

Co-authored-by: Nyuzhongyu <yuzhongyu@cestc.cn>