AWS Lambda landing page

[jharrell]

Fixes #5157

Describe this PR

This makes our AWS Lambda page more general. Originally the goal was to have separate pages per framework (we started with Serverless Framework) but we quickly realized that we have "generic" tips for AWS Lambda and then framework-specific tips. I thought of the following three choices:

1. A mega page with both generic tips and framework-specific tips
2. A page for generic tips and then subpages for framework-specific tips
3. Pages for framework-specific tips with a "generic" section at top of each.

I chose 1 as it did not repeat content (which could become out of sync) and made it so that all steps a user should follow are on the same page.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 26, 2023 5:15pm

[github-actions]

This PR changes the following pages (Vercel Preview Deploy links):

Changed Vercel links

• /docs/guides/deployment/serverless/deploy-to-aws-lambda (currently)

(Note that links will only be valid after Vercel preview deploy succeeded)

[github-actions]

This PR probably requires the following redirects to be added to vercel.json:

• This PR does not change any pages in a way that would require a redirect.

[nikolasburk]

I think this looks great and is so much better than what we have! I've left a small suggestion but I'd say let's merge it and then possibly refine further in the future 🙏

[nikolasburk]

actually went ahead and commited my suggestion myself 😄 so this is ready to merge from my end!