Adding JSON for Twilio flows to go with upcoming docs and blog post

# Change zvonok call verification

After May 27, the Zvonok service will block number verification that was
not set up as part of the phone number verification campaign. This PR
modifies the number verification process.

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## Checklist

- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] Added the relevant release notes label (see labels prefixed w/
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Co-authored-by: Innokentii Konstantinov <innokenty.konstantinov@grafana.com>

# What this PR does

- Fixes the display of preview schedule when you click on a row

Part of #4428

# What this PR does

re-enables the search for alert groups

## Which issue(s) this PR closes

Closes #2232

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## Checklist

- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] Added the relevant release notes label (see labels prefixed w/
`release:`). These labels dictate how your PR will
    show up in the autogenerated release notes.

---------

Co-authored-by: Joey Orlando <joey.orlando@grafana.com>
Co-authored-by: Joey Orlando <joseph.t.orlando@gmail.com>

# What this PR does

Part of #4428

Additionally it fixes
- NPE within `SchedulePersonal`
- changes the line-break to use `contrastText` instead of `main` (from
grafana theme)

# What this PR does

Only validate live settings in `AVAILABLE_NAMES` to avoid issues when a
live setting is renamed (one of the settings was renamed in
#4287 earlier)

## Checklist

- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] Added the relevant release notes label (see labels prefixed w/
`release:`). These labels dictate how your PR will
    show up in the autogenerated release notes.