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

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

Add syncBulkActions config to avoid the large amount of metrics data written ES in a single sync bulk request. (#5699)

added essence.com.cn

Add agent config `PROPERTIES_REPORT_PERIOD_FACTOR `, Avoid the instanceTraffic record properties is null. (#5688)

* Add browser performance dashboard.

* Fix file header missing.

* Make sure the templates in A-Za-z

* fix query browser error log  bug

Co-authored-by: Nggnn <ggnn@ggnndeMacBook-Pro.local>
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

Fix application start duration log "Failed to load class org.slf4j.impl.StaticLoggerBinder." (#5678)

* Fix application start duration log "Failed to load class "org.slf4j.impl.StaticLoggerBinder"." when use kafka reporter. because kafka reporter use slf4j-api, but no implementor for slf4j.

* Polishing.

* Adapter slf4j Logger of agent used to skywalking agent Logger.

* Make the comments more accurate.
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* Support Nacos auth

test: add a tool to select a suitable group for a new plugin test and remove the outdated group size of plugin tests (#5676)

Fix duplicate ExitSpan, Maybe this will cause some error message not recorded. because "feign load balance" mechanism will retry execute. (#5667)

* resttemplate plugin concurrency scenario data mistake problem 

* docs: fix broken istio-architecture svg

* server -> service

* Separate UI template files for further enhancement.

* Add doc about the UI template.

* Add SW_NO_UPSTREAM_REAL_ADDRESS config doc

* Fix legal config issue.

* Update docs/en/setup/backend/configuration-vocabulary.md

* Add a test case to verify the module config initializer, which only supports 4 simple types.
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

* fix typo in ProfileTask