Remove tape.unwrap and unwrap classes

[lillian542]

Remove tape.unwrap and accompanying classes

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit doc/releases/changelog-dev.md with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[lillian542]

[sc-43903]

[mudit2812]

Thanks!

[albi3ro]

🚀

[codecov]

Codecov Report

Merging #4535 (733d804) into master (a9bc37a) will decrease coverage by 0.05%.
Report is 8 commits behind head on master.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4535      +/-   ##
==========================================
- Coverage   99.71%   99.66%   -0.05%     
==========================================
  Files         379      376       -3     
  Lines       34398    33070    -1328     
==========================================
- Hits        34300    32960    -1340     
- Misses         98      110      +12     

Files Changed	Coverage Δ
pennylane/__init__.py	100.00% <ø> (ø)
pennylane/_device.py	99.40% <ø> (-0.30%)	⬇️
pennylane/data/data_manager/__init__.py	98.55% <ø> (ø)
pennylane/devices/experimental/default_qubit_2.py	100.00% <ø> (ø)
pennylane/drawer/style.py	99.09% <ø> (ø)
pennylane/gradients/finite_difference.py	100.00% <ø> (+0.53%)	⬆️
pennylane/gradients/hadamard_gradient.py	100.00% <ø> (ø)
pennylane/gradients/parameter_shift.py	100.00% <ø> (ø)
pennylane/gradients/pulse_generator_gradient.py	100.00% <ø> (ø)
pennylane/gradients/pulse_gradient.py	99.47% <ø> (-0.01%)	⬇️
... and 71 more

... and 2 files with indirect coverage changes