Add Cloud to version dropdown

[matthewshaver]

What are you changing in this pull request and why?

Adding dbt Cloud (Versionless) to version dropdown.

This is a cosmetic change only.

Checklist

• Review the Content style guide so my content adheres to these guidelines.
• For docs versioning, review how to version a whole page and version a block of content.
• Add a checklist item for anything that needs to happen before this PR is merged, such as "needs technical review" or "change base branch."

Adding or removing pages (delete if not applicable):

• Add/remove page in website/sidebars.js
• Provide a unique filename for new pages
• Add an entry for deleted pages in website/vercel.json
• Run link testing locally with npm run build to update the links that point to deleted pages

[vercel]

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Name	Status	Preview	Updated (UTC)
docs-getdbt-com	✅ Ready (Inspect)	Visit Preview	Aug 28, 2024 5:11pm

[mirnawong1]

this looks great! non blocker but i'm not sure if it looks cleaner if it's just 'dbt Cloud Versionless'. but either is great!

the bigger thing I've noticed is that if i select dbt Cloud (Versionless) in the dropdown, some pages (like build your metrics, retry, or contract disappear, along with any version blocks associated. i also see the 'this feature isn't available in dbt core version 1.10, yo ushoudl upgrade to..' banner. not sure if we want that for this experience?

it looks like for those examples, they're listed in the dbt-versions.js file so is there a discrepancy in what the dbt-versions.js file has listed and the `customDisplay for 1.10?

[matthewshaver]

Figured out that v1.10 is seen as less than v1.2-1.9, so that caused pages to disappear.
The config file respects semantic versioning so will use that until we have a chance to fix the behavior.
Shortened the name to prevent spacing issues

[mirnawong1]

tested it again and looks great to me! thank you so much @JKarlavige and @matthewshaver - rockstar team!