[APM] Add links to create SLOs from Alerts and Rules dropdown

[MiriamAparicio]

As part of Integrate SLOs in APM we want to add links to SLO app on the Alerts and Rules dropdown.

What needs to be done

A link "Create SLO" should be added just above "Manage Rules".
Create SLO Menu item with:
Define APM Latency SLI (type: 'sli.apm.transactionDuration')
Define APM Availability SLI (type: 'sli.apm.transactionErrorRate')

In order to create the links with proper param we can check the work done for the SLO callout

const sloInput: RecursivePartial<CreateSLOInput> = {
    indicator: {
      type: 'sli.apm.transactionErrorRate',
      params: {
        service: serviceName,
        environment,
        transactionName: transactionName ?? '',
        transactionType: transactionType ?? '',
      },
    },
  };
  const sloParams = `?_a=${encode(sloInput)}`;
  const path = `/app/observability/slos/create${sloParams}`

[elasticmachine]

Pinging @elastic/apm-ui (Team:APM)

[graphaelli]

There seems to be an issue with the current callout - #166765