CMake: DPC++, OMP Def., Binary Names (#1125)

With regards to the `WarpX_COMPUTE` options the following changes are
introduced:
- default: `OMP` (as in GNUmake)
- rename: `NONE` -> `NOACC` (no accelerated computing backend)
- adds: `DPCPP` (for SYCL/Intel DPC++ beta7 or newer)

Furthermore, we encode relevant, user-facing options in our binary
name. The namings are intentionally a different and skip few options
that are verbose and unlikely to appear even in development at the
same time. Furthermore, this builds a `warpx` symlink in `bin/` to
the latest build executable (when swtiching options), so that
repeated compile-and-test workflows do not need to take care of the
executable name anymore.

0 files changed, 0 insertions, 0 deletions