Upgrade OkHttp to 5.0.0 and Kotlin to 2.2.0 and removed @ignore testcases.

[utkrishtsahu]

Changes

Internal dependency upgrade

This PR upgrades the SDK's internal HTTP client library OkHttp from 4.12.0 to 5.0.0 and the Kotlin compiler from 2.0.21 to 2.2.0 (required for OkHttp 5.x metadata compatibility).

Endpoints added, deleted, deprecated, or changed

None. All Auth0 API endpoints remain unchanged.

Classes and methods added, deleted, deprecated, or changed

• No classes or methods added, deleted, deprecated, or changed in the public API.
• OkHttp is declared as implementation scope — it is not exposed transitively to consumers.
• Two internal call sites in WebAuthProvider.kt and OidcUtils.kt had toLowerCase(Locale.ROOT) replaced with lowercase(Locale.ROOT) due to Kotlin 2.2.0 promoting this deprecation to an error. These are private/internal methods with no public surface impact.

Test infrastructure migration

• Migrated from okhttp3.mockwebserver → mockwebserver3 package (new artifact in OkHttp 5.x)
• Adapted to MockResponse.Builder() pattern (immutable responses)
• RecordedRequest.path → .target, getHeader() → headers[], shutdown() → close()
• Null-safe body handling (ByteString? instead of Buffer)
• Re-enabled 2 @ignore'd tests in WebAuthProviderTest.kt that now pass with OkHttp 5.x

References

SDK-7768

Testing

Build Passed
Unit Test Passed

Checklist

• I have read the Auth0 general contribution guidelines

• I have read the Auth0 Code of Conduct

• All existing and new tests complete without errors