Fall back to less restrictive Container ID check if not found

[chynesNR]

As part of this PR we changed how we pull the the Container ID from cgroups in order to support cgroup v2 and to cut down on false positives. We have a customer where the old Agent (10.17 and below) works for them, but 10.18 and above does not.

We should have a fallback mechanism where if we can't find the Container ID with the existing regex, we should fall back to the "any 64 character alphanumeric string" regex. However, it's important that we only do this for cgroup v1. Attempting to parse mountinfo this way will result in false positives.

For Maintainers Only or Hero Triaging this bug
Suggested T-Shirt size (S, M, L, XL, Unknown): S

[workato-integration]

https://new-relic.atlassian.net/browse/NR-230908