feat: Update aws lambda docs

[anku255]

Summary of change

This PR updates the AWS lambda docs for all the recipes. All the changes are done in thirdpartyemailpassword recipe and then copied to other recipes (except few sections).

Checklist

• [ ] Algolia search needs to be updated? (If there is a new sub docs project, then yes)
• [ ] Sitemap needs to be updated? (If there is a new sub docs project, then yes)
• [ ] Checked for broken links? (Run cd v2 && MODE=production npx docusaurus build)
• [x] Changes required to the demo apps corresponding to the docs?

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[rishabhpoddar]

Merging this into the base branch and will review that PR instead of this one