Imported AssnsCrosser algorithm from icarusalg [3/3]

[PetrilloAtWork]

This is a dependent PR of SBNSoftware/sbnalg#2: see that PR for details.

This PR updates header paths and namespaces after the move of code from icarusalg to sbnalg.
Only @SFBayLaser to review this one.

[leoaliaga]

trigger build larsoft@v10_06_00 LArSoft/lar*@LARSOFT_SUITE_v10_06_00 SBNSoftware/sbnalg@v10_06_00_01 SBNSoftware/sbncode@v10_06_00_01 SBNSoftware/sbnalg#2

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

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

parent CI build details are available through the CI dashboard

[FNALbuild]

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

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

parent CI build details are available through the CI dashboard