chore: Fix linter config

[ncreated]

What and why?

📦 This PR updates the linter configuration to cover all relevant Swift test files in the project, addressing coverage gaps in the existing test.swiftlint.yml configuration.

How?

• Added new directories to the linter configuration.
• Removed obsolete or irrelevant locations.
• Updated code to align with the configuration.

New locations included:

+  - ../../TestUtilities
+  - ../../DatadogSessionReplay/SRSnapshotTests
+  - ../../Datadog/IntegrationUnitTests
+  - ../../E2ETests
+  - ../../BenchmarkTests/Runner
+  - ../../BenchmarkTests/Benchmarks

Locations removed:

-  - ../../Tests
-  - ../../TestUtilities/Sources
-  - ../../Datadog/E2ETests
-  - ../../Datadog/E2EInstrumentationTests

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
• Add CHANGELOG entry for user facing changes
• Add Objective-C interface for public APIs (see our guidelines [internal]) and run make api-surface)

[datadog-datadog-prod-us1]

Datadog Report

Branch report: ncreated/chore/fix-linter-config
Commit report: a9282e1
Test service: dd-sdk-ios

✅ 0 Failed, 3583 Passed, 0 Skipped, 2m 31.03s Total Time
🔻 Test Sessions change in coverage: 6 decreased, 3 increased, 5 no change

🔻 Code Coverage Decreases vs Default Branch (6)

This report shows up to 5 code coverage decreases.

• test DatadogInternalTests iOS 80.51% (-0.03%) - Details
• test DatadogWebViewTrackingTests iOS 18.6% (-0.03%) - Details
• test DatadogCrashReportingTests tvOS 26.65% (-0.03%) - Details
• test DatadogCrashReportingTests iOS 26.62% (-0.03%) - Details
• test DatadogTraceTests tvOS 54.22% (-0.01%) - Details