[DOCS] Bulk edit rule schedules

[jpdjere]

Description

• With work done for https://github.com/elastic/security-team/issues/2172 in PR [Security Solution][Detections] Add Bulk Scheduling for rules kibana#140166, users can now bulk edit schedule of rules (interval -runs every- and lookback time)

Images

New menu item for updating schedules in bulk

Modal warning that prebuilt rules are not editable

Flyout for updating schedules in bulk

Notes

• The bulk schedule form provides validation for the interval and lookback fields. The values must be a positive integer greater than 0. If the user tries to force a negative number or 0, the input will be automatically corrected to the minimum value of 1,