chore: adds Gitpod Flex support

[ricardogarim]

Proposed changes (including videos or screenshots)

As per CORE-923, this PR introduces support for running workspaces on Gitpod Flex, the new platform replacing Gitpod Classic, which is scheduled to be discontinued by April 2025.

Additionally, it includes a devcontainer configuration that addresses issues with loading NVM, Deno, and Meteor. These tools were previously problematic when using the .gitpod.yml configuration.

Issue(s)

Steps to test or reproduce

Further comments

• The .gitpod.yml file remains available for backward compatibility with Gitpod Classic, which will continue to operate until April 2025.
• For new workspaces, the recommended approach is to use devcontainer files along with Gitpod automation configurations for better compatibility and future-proofing.

[dionisio-bot]

Looks like this PR is not ready to merge, because of the following issues:

• This PR is targeting the wrong base branch. It should target 7.4.0, but it targets 7.3.0

Please fix the issues and try again

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[changeset-bot]

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Latest commit: 9efda02

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[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.20%. Comparing base (5ab0c52) to head (9efda02).
Report is 1 commits behind head on develop.

Additional details and impacted files

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