[FIX] - archive fails due to Cycle inside caused by dSym upload build phase

[sbarrio]

What does this PR do?

Reported on #90

Fixes a dependency cycle in Xcode's build system that caused iOS archive builds to fail.

The inputPaths/outputPaths added in #85 wired the "Upload dSYMs to Datadog" script phase into Xcode's dependency graph, creating a cycle.

This PR removes inputPaths/outputPaths and a guard to the script with DEPLOYMENT_POSTPROCESSING=YES so it only runs during archive builds.

Motivation

Using expo-datadog should not make the host app build fail.

Additional notes

Tested against the E2E expo app:

Release build

Archive build without exported DATADOG_API_KEY

Archive build with exported DATADOG_API_KEY

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)
• If this PR is auto-generated, please make sure also to manually update the code related to the change

[barboraplasovska]

👍🏻