fix(@angular/cli): handles not found packages for ng-update

[allout58]

PR Checklist

Please check to confirm your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular-cli/blob/main/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: #28834

What is the new behavior?

Packages in private or unknown repositories that cannot be found are skipped when trying to run ng update

Does this PR introduce a breaking change?

• Yes
• No

Other information

[alan-agius4]

Hi @allout58, thanks for the update! Unfortunately, this fix isn't correct, as it interferes with real cases where the error needs to be propagated. In fact, some of our E2E tests are failing because of this change.

Instead of using the package name, the value should be parsed and used.

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