mgr/dashboard：delete image fail on dashboard while it has some protected snapshots

[tengjie5]

Fixes: https://tracker.ceph.com/issues/62047
Signed-off-by: teng jie tengjie5@asiainfo.com

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[tengjie5]

@aaSharma14 @nizamial09 hi，would you please review the PR ?thanks.

[aaSharma14]

@aaSharma14 @nizamial09 hi，would you please review the PR ?thanks.

Hi @tengjie5 , Thanks for the contribution, will check it out

[Pegonzal]

Hi @tengjie5!

I was checking this PR, and I was trying to reproduce the issue as you stated in tracker but I wasn't able to do so.
Could you attach some logs of the error? It'd be great to see what's going on,

regarding the fix, looks good to me, but may be a 1 second sleep might be too much of a wait?

[tengjie5]

@Pegonzal hi, Maybe your hosts have better performance,I suggest creating more snapshots to reproduce the issue.
The dashboard only reported an error log： “Failed to delete RBD 'pool/image' RBD 'pool/image' is busy.”
About the duration of sleep，completing the operation often takes more than one second.

[github-actions]

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[github-actions]

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