* [maven-release-plugin] prepare release v8.7.0

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

 Fix the problem of Kafka transport topics are created duplicated with and without namespace (#7326) (#7329)

Groovy naturally supports many dynamic features that we don't benefit for now but cost performance loss, in this patch we compile our Groovy-based DSL scripts statically to optimize performance.

* OAL supports generating metrics from events

* Add new dashboard for event metrics

* Add some docs for event metrics

Add telemetry data about metrics in, metrics scraping and trace in metrics to zipkin receiver. (#6516)

* [maven-release-plugin] prepare release v8.4.0

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

* Increase metrics time range
* Remove unused codes
* Update SO11yE2E.java
Co-authored-by: NHongtao Gao <hanahmily@gmail.com>

* [maven-release-plugin] prepare release v8.3.0

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

* Add Istio control plane otel MAL expressions and UI template
* Remove OpenCensus receiver, add OpenTelemetry receiver
* Transfer oc receiver to ot receiver
* Create indices on boot
* Document istio metrics and otel receiver
* Update CHANGES.md
* Fix potential NPE
* Add group to meter and cleanup istio mixer
* Update e2e case due to the change of meter metric name
* Update prometheus fetcher config, fix sql builder issue of h2
* Disable istio and so11y metrics by default.
* Fix micrometer testcase

* 1.Add ThreadPoolExecutor for handle kafka message.
Co-authored-by: NDaming <zteny@foxmail.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* [maven-release-plugin] prepare release v8.2.0

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

* Support SSL for prometheus telemetry and prometheus fetcher
* Documents
* Clear up abandunt dependencies
* Update license
Signed-off-by: NGao Hongtao <hanahmily@gmail.com>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* fix bug #5417, make the CPU usage percent always >= 1

* [maven-release-plugin] prepare release v8.1.0

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

Signed-off-by: NGao Hongtao <hanahmily@gmail.com>

* [maven-release-plugin] prepare release v8.0.0

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

* Remove all shardingsphere cases.

* Support percentile function in the meter system.

* Update document.

* Fix formats.

* Support histogram function in Meter system.
* Add histogram in the document.
* Support infinite-