RUM-2746 feat: Add additional status codes as retryable

[ncreated]

What and why?

📦 This PR adds following HTTP status codes to the list of retryable codes. This is to prevent data loss upon receiving them from Intake:

• 502 - bad gateway
• 504 - gateway timeout
• 507 - insufficient storage

Counterpart of: DataDog/dd-sdk-android#1819

How?

Added these codes to HTTPResponseStatusCode. We use fuzzy testing in this part, so no extra tests added, but the configuration of existing ones is updated.

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

Custom CI job configuration (optional)

• Run unit tests for Core, RUM, Trace, Logs, CR and WVT
• Run unit tests for Session Replay
• Run integration tests
• Run smoke tests
• Run tests for tools/

[datadog-datadog-prod-us1]

Datadog Report

Branch report: ncreated/RUM-2745/include-additional-retry-codes
Commit report: 777dc78
Test service: dd-sdk-ios

✅ 0 Failed, 2483 Passed, 0 Skipped, 5m 28.47s Wall Time
🔻 Test Sessions change in coverage: 7 decreased, 6 increased

🔻 Code Coverage Decreases vs Default Branch (7)

This report shows up to 5 code coverage decreases.

• test DatadogCrashReportingTests tvOS 28.96% (Δ-0.09%) - Details
• test DatadogWebViewTrackingTests iOS 23.00% (Δ-0.08%) - Details
• test DatadogCrashReportingTests iOS 28.95% (Δ-0.06%) - Details
• test DatadogInternalTests tvOS 81.21% (Δ-0.05%) - Details
• test DatadogLogsTests tvOS 44.90% (Δ-0.05%) - Details