Bug - Pattern liquid testing

[delphine-demeulenaere]

Describe the bug
The CLI reads the YAML file as a string. When we run tests and define a pattern, those tests can include an alias, but the anchor was defined in a different section that gets filtered out when running the tests.

To Reproduce
Steps to reproduce the behavior:

silverfin run-test -f <firm_id> -h <handle> --pattern "pattern" Include a template test pattern that makes use of an alias in the Liquid test

Expected behavior
For the pattern test to take into account anchors and aliases.