Fixed target global position when using rootOverlay and inner navigator

[guildem]

Description

When using an inner navigator or on more complex use cases, there is offset between the tutorial target and the real widget position if using rootOverlay. This PR import the rootOverlay value to use it on the getTargetCurrent function, to use root Overlay context for RendeObject position.

Checklist

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• I open this PR to the develop branch.
• I have added a description of the change under [next] in CHANGELOG.md.
• I ran flutter format --set-exit-if-changed --dry-run . and has success.

Breaking Change

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• Yes, this is a breaking change (please indicate a breaking change in CHANGELOG.md).
• No, this is not a breaking change.

[RafaelBarbosatec]

LGTM! Thanks so much !