Investigate impact/need of providing template names in Daml Script

[basvangijzel-DA]

Based on customer feedback, consider the long term impact/need of providing template names in Daml Script.

It might help our own error messages, as we are currently missing a template name. However, it could make it easier for users to abuse string matching / using reflection like logic. Consider maintenance burden given our rework of package ID / package names.

Could possibly provide a typeclass builtin, but this might encourage people to case string match on template names.