Deprecate various functions that don't need to be defined for Index.

[vyasr]

This PR adds deprecations for various Frame methods that shouldn't actually be defined for Index objects. These methods can all be moved down to IndexedFrame in 22.08. This change contributes to making a clean distinction between Frame and IndexedFrame.

[bdice]

Two small questions/comments. Otherwise LGTM. This will help with the errors in Sphinx docs!

[codecov]

Codecov Report

Merging #10647 (c54dcde) into branch-22.06 (3c13ef1) will increase coverage by 0.02%.
The diff coverage is 83.60%.

@@               Coverage Diff                @@
##           branch-22.06   #10647      +/-   ##
================================================
+ Coverage         86.33%   86.36%   +0.02%     
================================================
  Files               140      142       +2     
  Lines             22289    22352      +63     
================================================
+ Hits              19244    19305      +61     
- Misses             3045     3047       +2     

Impacted Files	Coverage Δ
python/cudf/cudf/core/algorithms.py	90.47% <ø> (ø)
python/cudf/cudf/core/groupby/groupby.py	91.72% <ø> (+0.22%)	⬆️
python/cudf/cudf/core/multiindex.py	92.14% <ø> (ø)
python/cudf/cudf/core/series.py	95.28% <ø> (ø)
python/cudf/cudf/utils/cudautils.py	59.83% <ø> (ø)
python/cudf/cudf/utils/ioutils.py	79.60% <ø> (ø)
python/cudf/cudf/utils/utils.py	90.28% <ø> (ø)
python/cudf/cudf/core/frame.py	93.67% <56.52%> (-1.09%)	⬇️
python/cudf/cudf/core/column/lists.py	92.79% <100.00%> (+1.38%)	⬆️
python/cudf/cudf/core/dataframe.py	93.69% <100.00%> (+0.10%)	⬆️
... and 13 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 dd7143a...c54dcde. Read the comment docs.

[vyasr]

@gpucibot merge