feat(nimbus): rollouts audience form

[moibra05]

Because

• The new design requires the audience section for the rollout creation form

This commit

• Adds the audience section of the rollout form
• Fixes issue with overview form tag + subscriber inputs

Fixes #15079

[moibra05]

[yashikakhurana]

@moibra05 thank you 🎉 also one note can we do same like fonts and sizing as we have for overview section

like non bold, if you see advance targeting and all other texts seems to be bold in audience section 🤔

[moibra05]

Oh, i'm pretty sure they're the same