Speed up some methods for quasimodular forms ring elements

[DavidAyotte]

Fixes #34778

[codecov-commenter]

Codecov Report

Base: 88.59% // Head: 88.59% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (19195b2) compared to base (6a4667b).
Patch coverage: 96.42% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #35004      +/-   ##
===========================================
- Coverage    88.59%   88.59%   -0.01%     
===========================================
  Files         2136     2136              
  Lines       396141   396162      +21     
===========================================
- Hits        350977   350970       -7     
- Misses       45164    45192      +28     

Impacted Files	Coverage Δ
src/sage/modular/quasimodform/element.py	99.13% <96.42%> (-0.87%)	⬇️
src/sage/categories/super_modules_with_basis.py	96.29% <0.00%> (-3.71%)	⬇️
...rc/sage/categories/super_lie_conformal_algebras.py	95.00% <0.00%> (-1.67%)	⬇️
...e/combinat/cluster_algebra_quiver/mutation_type.py	51.30% <0.00%> (-1.55%)	⬇️
src/sage/doctest/forker.py	80.24% <0.00%> (-1.48%)	⬇️
src/sage/modular/hecke/algebra.py	94.65% <0.00%> (-1.07%)	⬇️
src/sage/graphs/generators/random.py	91.26% <0.00%> (-0.86%)	⬇️
src/sage/cpython/_py2_random.py	75.20% <0.00%> (-0.83%)	⬇️
src/sage/categories/weyl_groups.py	96.47% <0.00%> (-0.59%)	⬇️
src/sage/sets/integer_range.py	91.41% <0.00%> (-0.51%)	⬇️
... and 13 more

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[DavidAyotte]

@videlec you already reviewed this ticket (and put it to positive review), but there was a merging error. It is now fixed.

[tscrim]

Since it was previously positively reviewed.