fix(lambdify): make cse=True work with non-lists (1.11 branch)

[oscarbenjamin]

Co-authored-by: Jason K. Moore moorepants@gmail.com
Co-authored-by: Christopher Smith smichr@gmail.com

References to other Issues or PRs

Backport of #23975 and #23979 to the 1.11 branch.

Bump version to 1.11.1

Brief description of what is fixed or changed

Other comments

Release Notes

• utilities
  • The 1.11 release introduced a regression when using lambdify with the cse=True option (introduced in 1.9) resulting in a list being returned for a lambdified expression that was not a list. This bug is now fixed in the 1.11.1 release.

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• utilities
  • The 1.11 release introduced a regression when using lambdify with the cse=True option (introduced in 1.9) resulting in a list being returned for a lambdified expression that was not a list. This bug is now fixed in the 1.11.1 release. (#23976 by @oscarbenjamin)

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Co-authored-by: Jason K. Moore <moorepants@gmail.com>
Co-authored-by: Christopher Smith <smichr@gmail.com>

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#### References to other Issues or PRs
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Backport of #23975 and #23979 to the 1.11 branch.

Bump version to 1.11.1

#### Brief description of what is fixed or changed


#### Other comments


#### Release Notes

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  * Added a new solver for logarithmic equations.

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<!-- BEGIN RELEASE NOTES -->
* utilities
    * The 1.11 release introduced a regression when using `lambdify` with the `cse=True` option (introduced in 1.9) resulting in a list being returned for a lambdified expression that was not a list. This bug is now fixed in the 1.11.1 release.
<!-- END RELEASE NOTES -->

[github-actions]

Benchmark results from GitHub Actions

Lower numbers are good, higher numbers are bad. A ratio less than 1
means a speed up and greater than 1 means a slowdown. Green lines
beginning with + are slowdowns (the PR is slower then master or
master is slower than the previous release). Red lines beginning
with - are speedups.

Significantly changed benchmark results (PR vs master)

Significantly changed benchmark results (master vs previous release)

       before           after         ratio
     [77f1d79c]       [26f7bdbe]
     <sympy-1.10.1^0>       <sympy-1.11^0>
+     22.9±0.07μs       69.3±0.4μs     3.03  matrices.TimeMatrixExpression.time_MatAdd
+      98.6±0.7ms        178±0.9ms     1.80  sum.TimeSum.time_doit

Full benchmark results can be found as artifacts in GitHub Actions
(click on checks at the top of the PR).