RHEL 7 is limited to Node 16, which cannot load ESM-only modules. mongodb-runner@6.8.2 depends on yargs@18 (ESM-only), causing failures on that platform. After merging DRIVERS-3538, there is a failing task on RHEL 7.

A workaround was added in DRIVERS-3434 to pin a transitive dependency and avoid the same class of problem, but this approach requires ongoing maintenance as mongodb-runner evolves.

Instead, we should detect RHEL 7 at runtime and automatically fall back to mongo-orchestration, removing the need for the pin introduced in DRIVERS-3434. The test-mongodb-runner-partial task on RHEL 7 will continue to run and will exercise mongo-orchestration.