[RHOAIENG-1154]: Apply modal to alert user error

[jenny-s51]

Towards https://issues.redhat.com/browse/RHOAIENG-1154.

Description

Before:

After:

How Has This Been Tested?

Run application.cy.ts to simulate 403 status code and verify the modal is rendered.

Test Impact

Added new test to application.cy.ts.

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After the PR is posted & before it merges:

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[emilys314]

Would there be a way to detect specifically that the user's session timed out to show the new modal? I feel like it may be slightly misleading because it looks like the code is a catch all, but the message is specific for session expiration? Unless that was the idea, it also doesn't seem that straightfoward to figure out a expired session

[christianvogt]

I agree, we should look to identify the exact error response that comes from an expired session to show this modal otherwise we show the old error or update it with some other text if it's not related to expired session.

[xianli123]

Thanks @jenny-s51. The implementation looks good to me.
As for the description in the modal, it's based on the context of RHOAIENG-1154. I agree with @emilys314 @christianvogt. It would be better to identify the exact errors, and then we can update the description in the modal. If you have any concrete idea, please let me know and I can provide new design if needed.

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[jenny-s51]

Thank you for your feedback here @emilys314 @christianvogt @xianli123 - after investigating with @christianvogt we identified that a 403 status code indicates an expired session.

I've updated the implementation to render the modal when that status code is received, and added a corresponding Cypress test.