docs: replace pgpolicy with crudpolicy

[dhanushreddy291]

• Replace pgPolicy with crudPolicy

preview:

• https://neon-next-git-fork-dhanushreddy291-update-d-649b06-neondatabase.vercel.app/docs/guides/neon-authorize-clerk#1-add-row-level-security-policies
• https://neon-next-git-fork-dhanushreddy291-update-d-649b06-neondatabase.vercel.app/docs/guides/neon-authorize-stack-auth#1-add-row-level-security-policies
• https://neon-next-git-fork-dhanushreddy291-update-d-649b06-neondatabase.vercel.app/docs/guides/neon-authorize-stack-auth#1-add-row-level-security-policies

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Name	Status	Preview	Comments	Updated (UTC)
neon-next	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 20, 2024 1:06pm

[bgrenon]

@davidgomes can you review the change to crudPolicy for the Drizzle tabs on these quickstart pages?