chore: add CdkCliIntegTests to this repo (#415)

Now that the CLI tests are all run from the same repo, no need to have
them separately anymore. Moving it together will make experimenting
easier.

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

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Co-authored-by: github-actions <github-actions@github.com>

Author: rix0rrr

.projenrc.ts

@@ -1,10 +1,11 @@
 import * as path from 'path';
-import { yarn, CdkCliIntegTestsWorkflow } from 'cdklabs-projen-project-types';
+import { yarn } from 'cdklabs-projen-project-types';
 import type { TypeScriptWorkspaceOptions } from 'cdklabs-projen-project-types/lib/yarn';
 import * as pj from 'projen';
 import { Stability } from 'projen/lib/cdk';
 import { AdcPublishing } from './projenrc/adc-publishing';
 import { BundleCli } from './projenrc/bundle';
+import { CdkCliIntegTestsWorkflow } from './projenrc/cdk-cli-integ-tests';
 import { CodeCovWorkflow } from './projenrc/codecov';
 import { ESLINT_RULES } from './projenrc/eslint';
 import { IssueLabeler } from './projenrc/issue-labeler';