Collect templates from TemplateFlow instead of package data

[tsalo]

Closes #48.

Changes proposed in this pull request

• Remove templates that are only used by QSIPrep.
• Download necessary templates for TemplateFlow and reorient them to LPS with 3dResample.
• Remove remaining templates that were used by QSIRecon.

[tsalo]

We'll want to cache the downloaded templates in the build image so users aren't downloading them at runtime.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 68.42105% with 12 lines in your changes missing coverage. Please review.

Project coverage is 33.52%. Comparing base (c80616e) to head (757df18).

Files	Patch %	Lines
qsirecon/interfaces/anatomical.py	72.72%	6 Missing :warning:
qsirecon/workflows/recon/anatomical.py	0.00%	4 Missing :warning:
qsirecon/workflows/base.py	0.00%	1 Missing :warning:
qsirecon/workflows/reports.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #49 +/- ## ========================================== + Coverage 33.42% 33.52% +0.10% ========================================== Files 56 56 Lines 6825 6824 -1 Branches 894 891 -3 ========================================== + Hits 2281 2288 +7 + Misses 4446 4438 -8 Partials 98 98 ```

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[tsalo]

I'm a little surprised this actually worked, since it uses AFNI's 3dResample, but I thought the only thing from AFNI that we were keeping in the Docker image was 3dAutobox?

[tsalo]

@mattcieslak does this look good to merge now?