chore(toolkit): pass context to cx builders

[mrgrain]

Issue #32994

Closes #32994

Reason for this change

Previously it was not possible to provide external context.

Description of changes

Cloud Assembly Source Builder now optionally take a Context object that is provided to the source when the assembly is produced.

Describe any new or updated permissions being added

n/a

Description of how you validated changes

Unit tests

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

The pull request linter fails with the following errors:

❌ Features must contain a change to a README file.
❌ Features must contain a change to an integration test file and the resulting snapshot.

If you believe this pull request should receive an exemption, please comment and provide a justification. A comment requesting an exemption should contain the text Exemption Request. Additionally, if clarification is needed, add Clarification Request to a comment.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.44%. Comparing base (d16482f) to head (3443ada).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #32996   +/-   ##
=======================================
  Coverage   81.44%   81.44%           
=======================================
  Files         225      225           
  Lines       13702    13702           
  Branches     2404     2404           
=======================================
  Hits        11160    11160           
  Misses       2267     2267           
  Partials      275      275           

Flag	Coverage Δ
suite.unit	81.44% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
packages/aws-cdk	80.81% <ø> (ø)
packages/aws-cdk-lib/core	82.10% <ø> (ø)

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 3443ada
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[github-actions]

Comments on closed issues and PRs are hard for our team to see.
If you need help, please open a new issue that references this one.