feat: Remove DocAlias from RelatedDocument

[rjsparks]

No description provided.

[codecov]

Codecov Report

Merging #5841 (f4070ef) into feat/rfc (b61ea1d) will decrease coverage by 0.17%.
Report is 97 commits behind head on feat/rfc.
The diff coverage is 83.51%.

@@             Coverage Diff              @@
##           feat/rfc    #5841      +/-   ##
============================================
- Coverage     88.68%   88.51%   -0.17%     
============================================
  Files           288      288              
  Lines         40001    40073      +72     
============================================
- Hits          35474    35470       -4     
- Misses         4527     4603      +76     

Files Changed	Coverage Δ
ietf/doc/views_stats.py	74.80% <ø> (ø)
ietf/group/milestones.py	86.36% <0.00%> (ø)
ietf/ietfauth/widgets.py	84.61% <ø> (ø)
ietf/name/models.py	100.00% <ø> (ø)
ietf/review/utils.py	89.57% <ø> (ø)
ietf/secr/utils/group.py	91.30% <ø> (+22.88%)	⬆️
ietf/iesg/utils.py	81.57% <25.00%> (ø)
ietf/nomcom/views.py	92.90% <33.33%> (-0.22%)	⬇️
ietf/doc/utils_search.py	81.06% <36.36%> (-0.12%)	⬇️
ietf/iesg/views.py	93.67% <66.66%> (ø)
... and 29 more

... and 6 files with indirect coverage changes