ci: Added missing libraries to Docker

[ActuallyACat]

Objective

Related to this issue: aws/aws-cli#6094 (comment)

We need aws-cli so I've added gcc, alpine-sdk, and python-dev.

Screenshots (if appropriate)

Checklist

• If this contains visual changes, has it been reviewed by a designer?
• If this introduces either a new component or a breaking change to an existing component, has it been reviewed by an advocate? (Ask in #prod_design_systems)
• I have considered likely risks of these changes and got someone else to QA as appropriate
• I have or will communicate these changes to the front end practice

Additional Considerations

• Does there need to be right-to-left (RTL) options for localization and internationalization?
• Has the test suite been updated?
• Have you done cross-browser testing for our supported browsers?
• Have you updated any relevant documentation or left useful comments in the code?
• Have you reviewed Culture Amp's Web Accessibility guide Current Compliance, Going Forward, Statement and Answers for Customers?
• If this contains substantial visual changes, especially far reaching ones, have you unlocked the Chromatic step in the pipeline?
• Have Storybook stories been updated?

If you're new to Kaizen, please ask #prod_design_systems to set up an onboarding session to get you up to speed. If you have an urgent PR to merge before that happens, it is safest to ask in #prod_design_systems to have a design system advocate review the PR to catch any issues.