Re add the stream field form for PAF

[sandeepsajan0]

Fixes #2904

Add description here.

[codecov]

Codecov Report

Merging #2906 (91080a5) into main (0228ce1) will increase coverage by 0.00%.
The diff coverage is 61.79%.

❗ Current head 91080a5 differs from pull request most recent head c63fdf9. Consider uploading reports for the commit c63fdf9 to get more accurate results

@@           Coverage Diff           @@
##             main    #2906   +/-   ##
=======================================
  Coverage   81.87%   81.88%           
=======================================
  Files         678      681    +3     
  Lines       24662    24750   +88     
=======================================
+ Hits        20193    20267   +74     
- Misses       4469     4483   +14     

Impacted Files	Coverage Δ
hypha/apply/projects/models/__init__.py	100.00% <ø> (ø)
hypha/apply/projects/views/project.py	88.88% <20.00%> (-4.06%)	⬇️
hypha/apply/projects/admin_views.py	42.10% <42.10%> (ø)
hypha/apply/projects/admin.py	75.00% <60.00%> (-25.00%)	⬇️
hypha/apply/projects/models/project.py	92.27% <85.71%> (-0.20%)	⬇️
...100_alter_applicationbase_labbase_approval_form.py	100.00% <100.00%> (ø)
hypha/apply/funds/models/applications.py	84.75% <100.00%> (+0.10%)	⬆️
hypha/apply/funds/tests/factories/models.py	100.00% <100.00%> (ø)
hypha/apply/funds/tests/test_admin_form.py	100.00% <100.00%> (ø)
hypha/apply/projects/forms/project.py	97.39% <100.00%> (+0.02%)	⬆️
... and 3 more

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[frjo]

@sandeepsajan0 Nice! Ready to put on test?

[frjo]

Needs a rebase to update the migrations. Also please try to avoid out named migrations. Better with clear names.