Implement curl instrumentation and push it upstream

[intuibase]

• "Copy" features from legacy agent
• Research how to instrument curl_multi_* funtions
• Implement to be fully compatible with otel and push upstream

[intuibase]

otel issue:
open-telemetry/opentelemetry-php#1420
PR:
open-telemetry/opentelemetry-php-contrib#313
open-telemetry/opentelemetry-php-contrib#314