Temporarily restore old array shape compatibility in HERAData for the sake of pspec

[steven-murray]

This fixes compatibility with hera_pspec, which does not yet have future array shape support. I opened HERA-Team/hera_pspec#373 to make this happen, so we can revert to future array shapes after that.

[adeliegorce]

Hi, I don't think I can review because I don't know hera_cal but just for info: I do think it is a numpy version problem because now calling np.float throws an error when before is was only a DeprecationWarning

[codecov]

Codecov Report

Base: 97.08% // Head: 97.07% // Decreases project coverage by -0.02% ⚠️

Coverage data is based on head (eff4762) compared to base (541d065).
Patch coverage: 83.33% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #864      +/-   ##
==========================================
- Coverage   97.08%   97.07%   -0.02%     
==========================================
  Files          19       19              
  Lines        8648     8652       +4     
==========================================
+ Hits         8396     8399       +3     
- Misses        252      253       +1     

Impacted Files	Coverage Δ
hera_cal/io.py	98.41% <83.33%> (-0.08%)	⬇️

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turns out it was a different problem

[jsdillon]

Seems fine to me. @steven-murray can you make an issue (and assign yourself) to undo this PR when hera_pspec is ready?