[ML] Transforms - Updated: Add ability to delete dest index & index pattern when deleting transform job

[qn895]

This is an updated PR since the original PR #67922 was reverted due to a conflict that happens after merging to masters

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This PR adds the option to delete destination index & index pattern when deleting transform job(s) in two scenarios: single delete vs bulk delete.

When we are deleting transforms in bulk:

Delete message

Delete toast messages when all tasks succeed (in this case one transform job didn't have any index pattern)

Delete toast messages when some tasks failed

When we are deleting just one transform job individually:

• UI checks if user has permission to delete that individual index, shows the option if user has permission, and enables the option by default.
• UI checks if there's an index pattern that exists with the same name as the destination index, shows the option if user has permission and index pattern does exists, and enables the option by default.

• Toast messages

If all operations succeed

If one of the tasks failed

## Original discussion
When we are deleting in bulk:
<img width="493" alt="Screen Shot 2020-06-01 at 10 53 39 PM" src="https://user-images.githubusercontent.com/43350163/83482735-a5975800-a466-11ea-85c7-f3af5ca0f04a.png">

1) Should we assume user has permission to delete all the indices selected?

2) Should option to delete index pattern be visible and enabled? If one job might have index pattern but 2 other jobs might not.

3) Should we show success/error message for each individual job and operation or should we combine them to prevent toast message overload?

Checklist

Delete any items that are not applicable to this PR.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Unit or functional tests were updated or added to match the most common scenarios
• This was checked for keyboard-only and screenreader accessibility
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser
• This was checked for cross-browser compatibility, including a check against IE11

[elasticmachine]

Pinging @elastic/ml-ui (:ml)

[kibanamachine]

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• continuous-integration/kibana-ci/pull-request
• Commit: b10aa50

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