A recent EUI change has caused a problem with the theme when using the
deprecated `toMountPoint` inside `overlays.openFlyout` to create
flyouts.
This causes the contents of the rendered flyout to not know the current
theme, this is obvious when running in dark mode.

The fix is to switch to the non-deprecated version of `toMountPoint`.

Flyouts:
Create anomaly detection job from Lens flyout in Dashboard.
Anomaly swim lane and anomaly chart job embeddables job selection flyout
in Dashboard.
Log pattern analysis flyout in Discover.

Modals:
Trained models start deployment modal.
Trained models force stop deployment modal.
Trained models stop deployment modal when there are multiple
deployments.

Misc:
Page not found banner.
Jobs list header, which contains the settings button.
DFA clone job warning toast when the original data view no longer
exists.
Components in ml's date picker package

Fixes elastic#164379

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Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Dima Arnautov <arnautov.dima@gmail.com>
(cherry picked from commit af440aa)