RUMM-1206 Make DatadogCrashReporting static in Package.swift

[ncreated]

What and why?

📦 This PR adds necessary change for linking DatadogCrashReporting in Package.swift

-            type: .dynamic,
+            type: .static,

How?

This change is required to avoid following compiler errors in the apps using both DatadogStatic and DatadogCrashReporting:

Swift package product 'Kronos' is linked as a static library by 'SPMProject' and 'Datadog'. This will result in duplication of library code.
Swift package target '_Datadog_Private' is linked as a static library by 'SPMProject' and 'Datadog'. This will result in duplication of library code.
Swift package target 'Datadog' is linked as a static library by 'SPMProject' and 'Datadog'. This will result in duplication of library code.

From now on, to use Datadog crash reporting feature, apps must link DatadogStatic along with DatadogCrashReporting:

This PR also updates SPMProject with the above setup.

Review checklist

• Feature or bugfix MUST have appropriate tests (unit, integration)
• Make sure each commit and the PR mention the Issue number or JIRA reference

[ruthnaebeck]

Docs review

[buranmert]

that makes me think maybe we should've made Datadog, type: static by default while providing DatadogDynamic as an alternative.
we can consider this for v2.0, i'm taking a note