fix(core): only modify angular.json on read when @nx/angular is present

[JamesHenry]

Follow up to #16615

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 2, 2023 10:04am

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✅ Successfully ran 8 targets

• nx affected -t e2e-macos --parallel=1 --base= --head=
• nx affected --target=e2e --base=4e97ee94e1f6440b6fe51bd2af4ebc4592d932fa --head=e896de4328dd985c37970de08d63ff0d3ba253cc --parallel=1
• nx run-many -t check-imports check-commit check-lock-files depcheck --parallel=1 --no-dte
• nx affected --target=build --base=4e97ee94e1f6440b6fe51bd2af4ebc4592d932fa --head=e896de4328dd985c37970de08d63ff0d3ba253cc --parallel=3
• nx affected --target=lint --base=4e97ee94e1f6440b6fe51bd2af4ebc4592d932fa --head=e896de4328dd985c37970de08d63ff0d3ba253cc --parallel=3
• nx affected --target=test --base=4e97ee94e1f6440b6fe51bd2af4ebc4592d932fa --head=e896de4328dd985c37970de08d63ff0d3ba253cc --parallel=1
• nx-cloud record -- nx format:check --base=4e97ee94e1f6440b6fe51bd2af4ebc4592d932fa --head=e896de4328dd985c37970de08d63ff0d3ba253cc
• nx documentation --no-dte

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