docs(notebooks): use `UnitaryOverlap` for compute-uncompute in `scaling-estimator`

[pedrorrivero]

Summary

Use Qiskit's UnitaryOverlap for building compute-uncompute circuits in scaling-estimator.

[coveralls]

Pull Request Test Coverage Report for Build 8695884242

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

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Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 8680717349:	0.0%
Covered Lines:	290
Relevant Lines:	290

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💛 - Coveralls