Fix monitoring error box alignment

[jerolimov]

Fixes:
https://issues.redhat.com/browse/ODC-5997

Analysis / Root cause:
Error message is aligned with a flex layout to the center.

Solution Description:
Stretch the content of the flex layout.

I tested also the admin monitoring area but didn't find any difference.

Screen shots / Gifs for design review:
Before (in case of an error, for example with a local CRC):

With this PR and an error (local CRC):

With this PR and installed monitoring (shared cluster):

Unit test coverage report:
Unchanged. CSS only change.

Test setup:

• To get the error use a CRC
• Alternative: switch to monitoring tab (to load the JS), switch back, disconnect from internet or stop a local bridge, and switch back to the monitoring tab

Browser conformance:

• Chrome
• Firefox
• Safari
• Edge

[jerolimov]

/cc @vikram-raj

[jerolimov]

/kind bug

[vikram-raj]

verified the changes and its looks good to me.

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jerolimov, vikram-raj

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• frontend/public/components/monitoring/OWNERS [jerolimov]

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[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.