Add target_info metric defaults and include in prometheus exporter

[vordimous]

Describe the desired outcome from the user's perspective
As a System Obervibility admin, I want to see details about services in the standard target_info metric format. The more information about he running service I have the better. I expect this will be a standard metric across any exporter of metrics. I will need to disable target_info specifically if my metrics are exposed publicly.

Acceptance criteria

• include target_info in exported Prometheus metrics
• Allow target_info to be disabled without disabling all metrics
• Map telemetry attributes to the target_info metric

Additional context
OTEL Resources
Open Metrics target metadata

example metrics:

target_info{job="frontend-proxy", docker_cli_cobra_command_path="docker%20compose"}

target_info{redis_version="7.2.4"}

target_info{job="recommendationservice", telemetry_sdk_language="python", telemetry_sdk_name="opentelemetry", telemetry_sdk_version="1.22.0", docker_cli_cobra_command_path="docker compose", telemetry_auto_version="0.43b0"}

target_info{host_name="acbd472d7dae", job="adservice", os_description="Linux 6.6.22-linuxkit", os_type="linux", process_runtime_version="21.0.3+9-LTS", telemetry_sdk_language="java", telemetry_sdk_name="opentelemetry", telemetry_sdk_version="1.37.0", container_id="acbd472d7dae32e860184202b1bc03f23228e132347eb8c36b7777658bab9d49", docker_cli_cobra_command_path="docker compose", host_arch="aarch64", instance="45b48f58-7122-44c9-a156-84d8890116dc", process_command_line="/opt/java/openjdk/bin/java -javaagent:/usr/src/app/opentelemetry-javaagent.jar oteldemo.AdService", process_executable_path="/opt/java/openjdk/bin/java", process_pid="1", process_runtime_description="Eclipse Adoptium OpenJDK 64-Bit Server VM 21.0.3+9-LTS", process_runtime_name="OpenJDK Runtime Environment", telemetry_distro_name="opentelemetry-java-instrumentation", telemetry_distro_version="2.3.0"}

target_info{host_name="0ec93045bb97", job="frontend", os_type="linux", process_runtime_version="18.20.2", telemetry_sdk_language="nodejs", telemetry_sdk_name="opentelemetry", telemetry_sdk_version="1.18.1", docker_cli_cobra_command_path="docker compose", host_arch="arm64", process_executable_path="/usr/local/bin/node", process_pid="16", process_runtime_description="Node.js", process_runtime_name="nodejs", process_command_args="["/usr/local/bin/node","--require","./Instrumentation.js","/app/server.js"]", process_executable_name="node", process_owner="nextjs", os_version="6.6.22-linuxkit", process_command="/app/server.js"}