Add validation,prevalidation and allowBooking phases

[hariombalhara]

What does this PR do?

• Fixes #XXXX (GitHub issue number)
• Fixes CAL-XXXX (Linear issue number - should be visible at the bottom of the GitHub issue description)

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• I haven't read the contributing guide
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[linear]

PRI-305

[hariombalhara]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• Add validation,prevalidation and allowBooking phases #23389 👈 (View in Graphite)
• feat: [Booking Flow Refactor-2] Rename handleNewBooking and other handle files as corresponding services  #23296 : 1 other dependent PR (#23412 )
• chore: [Booking flow refactor - 2] Integrate Booking services #23156 : 2 other dependent PRs (#23283 , #23682 )
• chore: [Booking Refactor - Preparation - 0]Move modules required by RegularBookingService to moduleLoader format #23740
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

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[github-actions]

Hey there and thank you for opening this pull request! 👋🏼

We require pull request titles to follow the Conventional Commits specification and it looks like your proposed title needs to be adjusted.

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No release type found in pull request title "Add validation,prevalidation and allowBooking phases". Add a prefix to indicate what kind of release this pull request corresponds to. For reference, see https://www.conventionalcommits.org/

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