Revert "Emit the CodeView `S_ARMSWITCHTABLE` debug symbol for jump tables"

This reverts commit 8d0c3db3.

Causes crashes, see comments in https://reviews.llvm.org/D149367.

Some follow-up fixes are also reverted:

This reverts commit 636269f4.
This reverts commit 5966079c.
This reverts commit e7294dbc.