[Wf-Diagnostics] update diagnostics workflow to get rootcause for identified issues

[sankari165]

What changed?
Diagnostic workflow now has an additional activity to rootcause the identified timeouts. Follow up PR will combine identified issues and their rootcause to provide diagnostics report in json format

Why?
Provide potential rootcause to the users for the identified timeouts

How did you test it?
unit tests

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 72.94%. Comparing base (69d0ce7) to head (01a8a52).
Report is 3 commits behind head on master.

Files	Patch %	Lines
service/worker/diagnostics/workflow.go	75.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

Files	Coverage Δ
service/worker/diagnostics/activities.go	100.00% <100.00%> (ø)
service/worker/diagnostics/module.go	100.00% <100.00%> (ø)
service/worker/diagnostics/workflow.go	87.09% <75.00%> (-4.21%)	⬇️

... and 4 files with indirect coverage changes

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