Optical tutorial update

[lpaulucc]

Changes needed to run the optical tutorial after larg4 refactorization. This depends on PR LArSoft/larexamples#15 (comment) and will be kept as draft until this is merged.

[FNALbuild]

✔️ CI build for LArSoft Succeeded on slf7 for e26:prof -- details available through the CI dashboard

[FNALbuild]

✔️ CI build for LArSoft Succeeded on slf7 for c14:prof -- details available through the CI dashboard

[FNALbuild]

❌ CI build for DUNE Failed at phase build DUNE on slf7 for e26:prof -- details available through the CI dashboard

🚨 For more details about the failed phase, check the build DUNE phase logs

parent CI build details are available through the CI dashboard

[FNALbuild]

❌ CI build for DUNE Failed at phase build DUNE on slf7 for c14:prof -- details available through the CI dashboard

🚨 For more details about the failed phase, check the build DUNE phase logs

parent CI build details are available through the CI dashboard

[vpec0]

I don't see any show stoppers here if everything works.