PATCH to settings endpoint with default value shouldn't generate activity stream entry

[AlanCoding]

ISSUE TYPE

• Bug Report

SUMMARY

Settings operations generate a lot of useless noise when given their own default values.

STEPS TO REPRODUCE

PATCH to /api/v2/settings/all/ with a payload like {"SOME_SETTING": "value"} where the value is the system default of that setting, starting from the state after all settings have been reset to defaults.

EXPECTED RESULTS

Nothing changes, so there should be nothing in the activity stream about this

ACTUAL RESULTS

It "creates" the setting according to the activity stream

ADDITIONAL INFORMATION

This produces a lot of noise with how the UI operates specifically, followup from #10376