remove the prep keyword argument from tape

[timmysilv]

Context:
The prep kwarg from tape is no longer needed, and is being removed.

Description of the Change:
Remove the prep kwarg from tape

Benefits:
less code!

Possible Drawbacks:
N/A

[sc-47809]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (099bc38) 99.64% compared to head (2e7f11b) 99.64%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4756      +/-   ##
==========================================
- Coverage   99.64%   99.64%   -0.01%     
==========================================
  Files         381      381              
  Lines       34316    34052     -264     
==========================================
- Hits        34195    33930     -265     
- Misses        121      122       +1     

Files	Coverage Δ
pennylane/tape/operation_recorder.py	96.77% <100.00%> (ø)
pennylane/tape/qscript.py	100.00% <ø> (ø)
pennylane/tape/tape.py	98.54% <100.00%> (-0.02%)	⬇️

... and 40 files with indirect coverage changes

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[mudit2812]

Minor change, but breaking regardless, so let's hold off on merging it until after the release stuff is done. I don't want to end up in another situation like last time when we removed qml.active_return and it broke two plugins and caused the qml builds to fail.

[mudit2812]

Otherwise looks good!