Include stacktrace in record behavior

[harirajv]

Currently, the record DeprecationBehavior removes the stacktrace from the deprecation message before writing to YAML- https://github.com/Shopify/deprecation_toolkit/blob/main/lib/deprecation_toolkit/behaviors/record.rb#L11

This stacktrace is pretty useful info but it is removed from the YAML content - https://github.com/Shopify/deprecation_toolkit/blob/main/lib/deprecation_toolkit/collector.rb#L36

I am willing to submit a pull request that can change the behaviour, but would like to confirm why this done.

@Edouard-chin @rafaelfranca

[boardfish]

I'd also like to see this in CIRecordHelper. It might be good to default to just one line, but allow this to be controlled via config.