Use dpcpp compiler package for Linux

[PokhodenkoSA]

Now dpcpp_linux-64 compiler is available on -c intel. It is not necessary to install oneAPI.
This PR uses dpcpp compiler package instead of using oneAPI.
Only for Linux.

[AndresGuzman-Ballen]

LGTM! :D

[PokhodenkoSA]

For Linux Python 3.8 build fail:

conda.exceptions.ResolvePackageNotFound:
15:15:35
    - libgcc_mutex==0.1=conda_forge

[AndresGuzman-Ballen]

@PokhodenkoSA oh that's annoying; don't know why it randomly does that. I restarted the build for py38 on Linux. Hopefully it doesn't happen again.

[AndresGuzman-Ballen]

@PokhodenkoSA all tests passed! You can merge now :)

[reazulhoque]

@AndresGuzman-Ballen @PokhodenkoSA is this package available through public channel? We have to think about public CI too.

[AndresGuzman-Ballen]

@reazulhoque it's available in our Intel channel and sometime this week it should be available via Anaconda's main channel. Would this be a problem if it is won't be in the conda-forge channel for a while?

[reazulhoque]

@AndresGuzman-Ballen No, I think any sort of public avaialibility is fine.