feat(bottlecap): add EventBridge inferred spans

[alexgallotta]

• add event bridge

• change api_gateway -> api-gateway metadata as in https://github.com/DataDog/datadog-agent/blob/main/pkg/serverless/invocationlifecycle/constants.go#L45

• use CARGO_MANIFEST_DIR in test dir

• use host network to build bottlecap to speed up build and avoid timeouts

Notes

Not doing EB-SQS or EB-SNS yet

[duncanista]

Actually, before merging, we might want to use the work @nhulston did to get an accurate time for EventBridge