feat: add distributed tracing support for Kuadrant components

[silvi-t]

Description

• Add distributed tracing support for Kuadrant components (Authorino, Limitador, wasm-shim, and gateway)
• Implement trace collection and verification infrastructure to validate end-to-end request flows across all Kuadrant services
• Enhance tracing infrastructure with new helper methods for querying and analyzing trace spans
• Enable observability configuration in Kuadrant CR with tracing options and custom request ID tracking

New Features

• Istio Tracing Configuration (testsuite/istio/__init__.py): New module with IstioCR and Telemetry classes to configure Istio mesh-level tracing via Sail Operator
• Component Tracing Support:
  • AuthorinoCR.set_tracing() and reset_tracing() methods in testsuite/kuadrant/authorino.py
  • LimitadorCR.set_tracing() and reset_tracing() methods in testsuite/kuadrant/limitador.py
• Enhanced Observability Options (testsuite/kuadrant/__init__.py): New dataclasses ObservabilityTracingOptions, DataPlaneOptions, and DataPlaneDefaultLevels for granular observability configuration
• KuadrantCR Observability: Updated set_observability() to accept both simple bool and full ObservabilityOptions configuration

Tests

• New Test Suite (testsuite/tests/singlecluster/tracing/test_kuadrant_tracing.py):
  • test_trace_includes_all_kuadrant_services(): Validates traces include wasm-shim, authorino, limitador, and gateway services
  • test_spans_have_correct_policy_source_references(): Verifies auth and ratelimit spans reference correct AuthPolicy/RateLimitPolicy sources
  • test_send_reply_span_on_request_rejection(): Tests send_reply spans capture correct status codes for 401/429 rejections
• Test Configuration (testsuite/tests/singlecluster/tracing/conftest.py): Module-scoped fixtures for configuring Authorino, Limitador, Istio, and Kuadrant observability with automatic cleanup

Refactoring

• Tracing Client Improvements (testsuite/tracing/jaeger.py, testsuite/tracing/tempo.py):
  • Renamed search() to get_trace() with configurable tag_name parameter for better flexibility
  • Added get_spans(), get_spans_by_operation(), and get_tags_dict() helper methods to JaegerClient
  • Updated Tempo client to support new get_trace() signature
• Authorino Tests: Updated test_tracing.py and test_tracing_tags.py to use new get_trace() method

Verification steps

poetry run pytest -vv  testsuite/tests/singlecluster/tracing/test_kuadrant_tracing.py
poetry run pytest -vv --standalone testsuite/tests/singlecluster/authorino/operator/tracing/test_tracing.py testsuite/tests/singlecluster/authorino/operator/tracing/test_tracing_tags.py