Modified Barrel TOF geometry to add dead spaces between sensors and between support ring structure

[ssedd1123]

Briefly, what does this PR introduce?

The BTOF active volume is modified to be more realistic. Now there are dead spaces between each sensors on a stave and extra dead space is reserved in the center of the BTOF to make space for the central supporting ring structure. Variables relevant to the dead spaces, sensor sizes and the width of the ring are adjustable from tof_barrel.xml.

What kind of change does this PR introduce?

• [ ] Bug fix (issue #__)
• [ ] New feature (issue #__)
• [ ] Documentation update
• [x] Other: BTOF geometry is modified to accommodate individual sensors.

Please check if this PR fulfills the following:

• [ ] Tests for the changes have been added
• [ ] Documentation has been added / updated
• [ ] Changes have been communicated to collaborators

Does this PR introduce breaking changes? What changes might users need to make to their code?

Does this PR change default behavior?

[ssedd1123]

The check run "eicweb/eic_container" has been pending for about a day now while everything else (except linux-eic-shell / validate-material-map) have passed. Does anyone know why is that job pending for so long? Are there things I can do to speed it up?

Edit: NVM, I was just too impatient. The job eventually finish.