[OSD-20514] Retry send SL notification

[a7vicky]

What type of PR is this?

(feature)

What this PR does / why we need it?

Retry if it fails to send SL.

Which Jira/Github issue(s) this PR fixes?

Fixes #OSD-20514

Special notes for your reviewer:

Pre-checks (if applicable):

• Tested latest changes against a cluster
• Ran make generate command locally to validate code changes
• Included documentation changes with PR

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: a7vicky

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 86.48649% with 5 lines in your changes missing coverage. Please review.

Project coverage is 48.46%. Comparing base (9c8017f) to head (ef43c6f).

Files with missing lines	Patch %	Lines
pkg/handlers/webhookreceiver.go	87.50%	2 Missing and 1 partial ⚠️
pkg/handlers/reattempt.go	84.61%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #111      +/-   ##
==========================================
+ Coverage   47.94%   48.46%   +0.52%     
==========================================
  Files          20       21       +1     
  Lines        1508     1531      +23     
==========================================
+ Hits          723      742      +19     
- Misses        745      747       +2     
- Partials       40       42       +2     

Flag	Coverage Δ
	48.46% <86.48%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
pkg/handlers/reattempt.go	84.61% <84.61%> (ø)
pkg/handlers/webhookreceiver.go	79.35% <87.50%> (+0.04%)	⬆️

[openshift-ci]

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[a7vicky]

/hold