* chore: add test validating contains and ncontains in pipeline filter are case insensitive
* chore: qb2expr: translate contains and ncontains to case insensitive comparison
* chore: minor cleanup
* chore: logs pipelines: add test for validating workaround for working with dots in keys
* fix: temp workaround for supporting pipeline filters using names with dots converted to underscore
* chore: add test validating collector doesn't spam logs for string ops on missing attributes
* fix: pipelines filter: check if attrib is not nil before running string operator
* chore: do a nil check for all but == and != ops
