fix(angular): back button goes back to proper tab on angular 11.2.10

[liamdebeasi]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: resolves #23230

What is the new behavior?

• Created a deep copy of the route when deactivating to account for angular clearing out that context in v11.2.10

Does this introduce a breaking change?

• Yes
• No

Other information

[liamdebeasi]

Note: Not adding a test because we already have one for this use case: 52e5a8d

Just bumped the test app to ng11 so that this angular change is present.