Allow enable of TpetraTSQR to support SPARC

Created by: bartlettroscoe

CC: @mhoemmen, @fryeguy52, @kddevin (Trilinos Data Services Product Lead), @trilinos/tpetra

The SPARC team has requested the enable of the TpetraTSQR subpackage to usage in SPARC. Currently the ATDM Trilinos configuration explicitly disables TpetraTSQR by default (because it was not being usesd by SPARC or EMPIRE).

But note that TpetraTSQR is enabled by default in the Trilinos PR builds, for example, as shown in the GCC 4.8.4 build and CUDA 9.2 build which showed:

Final set of enabled SE packages:  ... TpetraTSQR ... 137

Therefore, it should be safe to allow the enable of TpetraTSQR in the ATDM Trilinos builds.