Add introduced userstore circuit breaker configuration to 5.10 and 6.1.0

[Tiffany-silva]

Purpose

Added documentation for the fix introduced with [1].

Goals

Document the introduced configuration through [1] for 5.10 [2] and 6.1 [3].

Approach

Include the configurations introduced through the fix as notes under the userstore docs.

Release note

This fix addresses the failures that occur when a particular userstore is down. The circuit breaker has been introduced to handle this behavior, allowing for smooth operations even when a specific userstore is unavailable. This feature is enabled by default. If you need to disable it, add the following configuration:

enable_circuit_breaker_for_user_stores=false


[1] https://github.com/wso2/carbon-kernel/pull/3632/files
[2] https://github.com/wso2-support/carbon-kernel/pull/2511
[2] https://github.com/wso2-support/carbon-kernel/pull/2514

[SujanSanjula96]

Shall we update the latest docs as well since public PRs are merged.