Update login page (#20255)

* Enhance Gitpod login page

* `Early access` pill in line with Gitpod Flex

* copy update

* Gitpod Engraved svg file

* early access pill ✅

* cleanup

* chore: Update early access pill styling on Gitpod login page

* Recompartmentalize and tweak looks

Changed the early access badge SVGs and made the login section at least as tall as the screen

* Extract `<TermsOfServiceAndPrivacyPolicy>`

* capitalize 'em devcontainers

* nit fix

* Don't use `isGitpodIo`

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Co-authored-by: Filip Troníček <[email protected]>

Author: Siddhant-K-code