fix: don't cfs filter when cfs is disabled

[maze-runnar]

Fixes #5578

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

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[codecov]

Codecov Report

Merging #5583 (2b4bddd) into development (a0d1679) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           development    #5583      +/-   ##
===============================================
- Coverage        23.71%   23.70%   -0.01%     
===============================================
  Files              498      498              
  Lines             5255     5257       +2     
  Branches            44       44              
===============================================
  Hits              1246     1246              
- Misses            4003     4005       +2     
  Partials             6        6              

Impacted Files	Coverage Δ
.../components/forms/wizard/sessions-speakers-step.js	0.00% <0.00%> (ø)
app/routes/index.js	78.57% <ø> (ø)
app/controllers/admin/users/list.js	0.00% <0.00%> (ø)
app/components/forms/wizard/attendee-step.js	0.00% <0.00%> (ø)

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[iamareebjamal]

If speaker call is being disabled, announcement should be set to null, not empty string

[maze-runnar]

it's giving error field may not be null.

[iamareebjamal]

Make it nullable in server please

[maze-runnar]

announcement = db.Column(db.Text, nullable=True) do i have to migrate also after making it nullable.

[iamareebjamal]

Any change in schema means migration