chore: Added Switch as build target for integration tests

[bitsandfoxes]

Summary

This aims to allow running integration-test.ps1 locally and on the console runner.
The integration test consists of

• Installing the package
• Configuring Sentry
• (New) Copying the native plugin
• Building
• (Optionally) Running the smoke test

Implementation

The integration-test.ps1 was originally designed to do what CI does, but locally, using the same scripts. This now extends this to support the manual copying of native libs step. For that reason building and packaging/extracting got stripped out into dev-integration-test.ps1 to still allow for local workflows.

Usage

Local Development

# Standard platforms (macOS, Windows, Linux)
./test/Scripts.Integration.Test/dev-integration-test.ps1 `
    -Platform "macOS" `
    -UnityVersion "2022.3.70f1" `
    -Clean

Integration Test (Phase 1: Building)

# CI / Local Runner
./test/Scripts.Integration.Test/integration-test.ps1 `
    -UnityPath "/path/to/unity" `
    -UnityVersion "2022.3.70f1" `
    -Platform "Switch" `
    -PackagePath "/ci/artifacts/sentry-unity-package" `
    -NativeSDKPath "/ci/artifacts/switch-native-sdk" `
    -SkipTests

#skip-changelog

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

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[JoshuaMoelans]

just a few qs and nits, but otherwise LGTM

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