Patch dynamic_one_shot for single shot case

[albi3ro]

Context:

Dynamic one shot was raising an error in the case of a single shot.

Description of the Change:

Adding back in a dimension if the samples have an empty shape before the line that was raising the error.

Benefits:

That particular error no longer occurs.

Possible Drawbacks:

Other parts of the logic might also give errors due to the squeezed nature of samples when created with a single shot. But for the sake of simplicity, I just focused on patching the case we knew lead to an error.

Related GitHub Issues:

[sc-69687] Fixes #6036

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@              Coverage Diff               @@
##             v0.38.0-rc0    #6149   +/-   ##
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  Coverage               ?   99.66%           
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  Files                  ?      445           
  Lines                  ?    42362           
  Branches               ?        0           
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  Hits                   ?    42220           
  Misses                 ?      142           
  Partials               ?        0           

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[vincentmr]

Good to test the 1-sample case in a few spots. Looks good to me, thanks @albi3ro .