Paraview/Vizer : remove hardcoded anfhome value in the paraview/vizer home

[xpillons]

Describe the feature

/anfhome is hardcoded in the paraview home field, which is not updated when changing the value of {{homedir_mountpoint}} in the configuration file

[themorey]

this also applies to Ansys & VMD

grep -ir anfhome playbooks/roles/ood-applications/*
playbooks/roles/ood-applications/files/bc_paraview/readme.md:the ParaView binaries under `/anfhome/apps/paraview` by default. The default ParaView root directory
playbooks/roles/ood-applications/files/bc_paraview/readme.md:is defined as `/anfhome/apps/paraview`, but it can be changed in the `form.yml.erb` file and is a parameter in the UI.
playbooks/roles/ood-applications/files/bc_paraview/readme.md:The default version is `5.11.0` and is mapped to the `/anfhome/apps/paraview/5.11.0` folder to launch ParaView.
playbooks/roles/ood-applications/files/bc_paraview/form.yml.erb:        value: "/anfhome/apps/paraview"
playbooks/roles/ood-applications/files/bc_ansys_workbench/readme.md:The default ANSYS root directory is defined as `/anfhome/apps/ansys`, but it can be changed in the `form.yml.erb` file and is a parameter in the UI.
playbooks/roles/ood-applications/files/bc_ansys_workbench/readme.md:The default version is `2021R2` and is mapped to the `/anfhome/apps/ansys/v212` folder to launch ANSYS Workbench. If you need to add another version then :
playbooks/roles/ood-applications/files/bc_ansys_workbench/form.yml.erb:    value: "/anfhome/apps/ansys"
playbooks/roles/ood-applications/files/bc_vmd/readme.md:The default VMD root directory is defined as `/anfhome/apps/vmd`, but it can be changed in the `form.yml.erb` file and is a parameter in the UI.
playbooks/roles/ood-applications/files/bc_vmd/form.yml.erb:    value: "/anfhome/apps/vmd"
playbooks/roles/ood-applications/files/bc_vizer/form.yml.erb:        value: "/anfhome/apps/vizer/datasets/headsq.vti"