Consolidate MTD modifiers

[kpedro88]

After #27449, the "tile" option for MTD is no longer exercised anywhere. I propose:

• merging the modifiers phase2_timing_layer and phase2_timing_layer_bar
• removing the modifier phase2_timing_layer_tile
• simplifying the naming of Phase2 top-level Eras (since only Eras appended with "_timing_layer_bar" are used)
• removing any extraneous code that supports the "tile" option
• removing code only used for the old, TP implementation, e.g. FTLDigitizer and related classes (maybe even related data formats)

attn: @fabiocos @lgray @pmeridian @casarsa

[kpedro88]

assign upgrade

[cmsbuild]

New categories assigned: upgrade

@kpedro88 you have been requested to review this Pull request/Issue and eventually sign? Thanks

[cmsbuild]

A new Issue was created by @kpedro88 Kevin Pedro.

@davidlange6, @Dr15Jones, @smuzaffar, @fabiocos, @kpedro88 can you please review it and eventually sign/assign? Thanks.

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[fabiocos]

@kpedro88 once the tile scenario is removed what you propose makes sense. As it will stay available in older releases I think it should be ok, anyway I would like to understand from @pmeridian @lgray whether they envisage lates studies using that scenario (I doubt but...)

[casarsa]

@kpedro88 @fabiocos @pmeridian @lgray To further clean and simplify the MTD code, could we also consider removing the old SimpleFTLDigitizer?

[kpedro88]

@casarsa I highly encourage removing any code that is unused/unneeded after the workflow cleanup

[kpedro88]

The first part of this issue is addressed in #28387

MTD developers should handle the actual code changes (removing unneeded features/classes/etc.)

[kpedro88]

+upgrade
resolved by #28915

[cmsbuild]

This issue is fully signed and ready to be closed.