[Docs]OSPP-Add more observability in apollo config client (#5229)

* feat(): add apollo-client-observability docs

* feat(): add apollo-client-observability docs

* feat(): add apollo-client-observability docs

* feat(): add apollo-client-observability docs

* Update docs/zh/client/java-sdk-user-guide.md

Co-authored-by: wxq <[email protected]>

* docs(): add doc

* docs(): add doc

* Update docs/zh/client/java-sdk-user-guide.md

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* docs(): add doc

* docs(): add english doc

* fix(): conflict

* fix(): conflict

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Co-authored-by: wxq <[email protected]>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>