Update with service health initiative

[jfaurskov]

Modify workflows to deploy service health initiative and assign it
Create Service health inititative including service health alerts and alert processing policy
Modify existing initiatives to remove service health alert policies
Update existing assign bicep files to remove alert processing policy assignment
Add assign bicep file for service health alert initiative
Modify existing parameter files to remove service health alerts
create parameter file for service health alert initiative
Update deployment guide with guidance on how to deploy service health initiative
Update alert details with more specific heading
Update policyinitiatives with correct mapping for policies to initiatives

[arjenhuitema]

LGTM

[paulgrimley]

Reviewed deployment guide offline and good with changes