New flatten buildpacks/builder implementation - Part 1 - removing depth

[jjbustamante]

Summary

This PR removes the --depth flag from pack builder create and pack buildpack package commands, because it is not being used.

Output

Before

pack builder create and pack buildpack package commands have the following flag:

Flags:
      --depth int    Max depth to flatten each composite buildpack.

After

The flag is not available.

Documentation

• Should this change be documented?
  • Yes, see #___
  • No

Related

Resolves #1880

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (7b5164c) 79.64% compared to head (14684c7) 79.51%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1925      +/-   ##
==========================================
- Coverage   79.64%   79.51%   -0.12%     
==========================================
  Files         174      174              
  Lines       13126    13074      -52     
==========================================
- Hits        10453    10395      -58     
- Misses       2010     2016       +6     
  Partials      663      663              

Flag	Coverage Δ
os_linux	78.43% <96.56%> (-0.10%)	⬇️
os_macos	76.22% <96.56%> (-0.11%)	⬇️
os_windows	78.90% <96.56%> (-0.12%)	⬇️
unit	79.51% <96.56%> (-0.12%)	⬇️

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[natalieparellano]

Looks good @jjbustamante. I added one question to understand it better. It's nice to see all the complexity going away here. My apologies for being the person to suggest 'depth' in the first place.

[jjbustamante]

@natalieparellano thanks for you feedback! I will take a look