[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?

Edit "--cookie-expire=23h0m0s" in the Dashboard deployment to a lower value (you should also scale down to 0 the rhods operator pod).

Test Impact

Needs info - no existing tests and no updates to the back end in this PR.

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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.