Generate Doxygen Tag File for Libcudf

[isVoid]

A doxygen tag file is a compact representation of entries in the doxygen documentation. Doxygen can generate tag files and read tag files from external sources. Local test shows that including tag file for libcudf does not have visible impact on build time and the tag file size is manageable (~126KB).

This is similar to rmm tag file:
https://github.com/rapidsai/rmm/blob/c49493dea6caf7e8c840b1c83f20caa50de92d5f/doxygen/Doxyfile#L2084

[bdice]

This looks good. Thanks for linking the RMM example for comparison. This is almost exactly how intersphinx works, too. Those files (object.inv) are generated by default.

[codecov]

Codecov Report

Merging #10932 (dfe1635) into branch-22.08 (8d861ce) will increase coverage by 0.98%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-22.08   #10932      +/-   ##
================================================
+ Coverage         86.40%   87.38%   +0.98%     
================================================
  Files               143      144       +1     
  Lines             22448    25148    +2700     
================================================
+ Hits              19396    21976    +2580     
- Misses             3052     3172     +120     

Impacted Files	Coverage Δ
...thon/dask_cudf/dask_cudf/tests/test_distributed.py	18.86% <0.00%> (-67.93%)	⬇️
python/cudf/cudf/io/parquet.py	90.83% <0.00%> (-1.87%)	⬇️
python/dask_cudf/dask_cudf/backends.py	85.25% <0.00%> (-1.19%)	⬇️
python/cudf/cudf/core/column/decimal.py	90.60% <0.00%> (-0.50%)	⬇️
python/cudf/cudf/core/column/lists.py	91.70% <0.00%> (-0.38%)	⬇️
python/cudf/cudf/core/scalar.py	89.01% <0.00%> (-0.31%)	⬇️
python/cudf/cudf/core/column/string.py	88.78% <0.00%> (-0.31%)	⬇️
python/cudf/cudf/core/index.py	92.06% <0.00%> (-0.25%)	⬇️
python/dask_cudf/dask_cudf/io/tests/test_s3.py	96.05% <0.00%> (-0.15%)	⬇️
python/cudf/cudf/utils/ioutils.py	79.47% <0.00%> (-0.13%)	⬇️
... and 29 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8d861ce...dfe1635. Read the comment docs.

[vyasr]

@harrism should we bump this to 22.08 and then merge? It's a tiny change that almost certainly won't break anything, but it's also just helpful for devs so no point pushing it into 22.06 past code freeze IMO.

[bdice]

It seems like nightly builds of the docs are available so I see no issue with punting this to 22.08 unless @isVoid needs this for cross-referencing docs in cuSpatial 22.06.

[isVoid]

Retargeted 22.08

[karthikeyann]

rerun tests

[karthikeyann]

LGTM 👍

[isVoid]

@gpucibot merge