Revert "[Dexter] Remove builder from Dexter"
& Revert "[Dexter] Fix incorrect substitution errors in clang-cl builder"
This reverts commits
262520a3c5450fd7f149438245b2aef12736347f,
and
0b72b71cd3c8ad824342c05bc6d9d64d87eeb81b.
Failures occurred on two buildbots, the SIE buildbot:
https://lab.llvm.org/buildbot/#/builders/216/builds/26006
And the green dragon buildbot:
https://green.lab.llvm.org/green/view/LLDB/job/lldb-cmake/59091
Errors appear to be related to incorrect tool substitution in the Dexter
test commands, and a currently unknown error with one of the general
debuginfo tests that uses Dexter.