NGINXaaS: update NGINXaaS Cost Estimator with Tiered pricing

[xynicole]

Proposed changes

update NGINXaaS Cost Estimator with Tiered pricing

Checklist

Before sharing this pull request, I completed the following checklist:

• I read the Contributing guidelines
• My branch adheres to the Git conventions
• My content changes adhere to the F5 NGINX Documentation style guide
• If my changes involve potentially sensitive information¹, I have assessed the possible impact
• I have waited to ensure my changes pass tests, and addressed any discovered issues

Footnotes

1. Potentially sensitive information includes personally identify information (PII), authentication credentials, and live URLs. Refer to the style guide for guidance about placeholder content. ↩

[github-actions]

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[nginx-jack]

Can you run the playwright tests for this, and make sure they're passing?
cd tests && npx playwright test
@lamATnginx can you help our here if there are any issues?

[lamATnginx]

Code changes look good for the most part and thank you for adding them, but some test need to be added:

1. Test added similar to https://github.com/nginx/documentation/pull/1596/files#diff-44961457451d64b0d5be0f5d6964247d67eb8188ea0754e574e8b26d68e12ce7
2. Update the github action's white-listed paths to include the paths to source code for Google calculator: https://github.com/nginx/documentation/pull/1596/files#diff-7afcd2d8f7b49bda74843f209eefb7b2da45f7e7803bf2e4bd636699b76aa2d3R6