Refactor EulerMaruyama to work in v4

[junpenglao]

Close #4642

Major / Breaking Changes

• ...

Bugfixes / New features

• Refactor EulerMaruyama distribution

Docs / Maintenance

• ...

[codecov]

Codecov Report

Merging #6227 (98aadfd) into main (98aadfd) will not change coverage.
The diff coverage is n/a.

❗ Current head 98aadfd differs from pull request most recent head fe9cb3d. Consider uploading reports for the commit fe9cb3d to get more accurate results

Additional details and impacted files

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##             main    #6227   +/-   ##
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  Coverage   78.29%   78.29%           
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  Files         101      101           
  Lines       22129    22129           
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  Hits        17326    17326           
  Misses       4803     4803           

[ricardoV94]

Looks great @junpenglao, some questions below.

Also, would it be too much trouble to split the tiny AR fixes from the new distribution refactoring into just 2 commits so that we don't have to squash everything together?

[ricardoV94]

Also, would it be too much work to implement a moment?

[junpenglao]

Thanks for the comments.

Also, would it be too much work to implement a moment?

I dont think this possible as user can input arbitrary sde_fn with moment unspecified.

[junpenglao]

Also, would it be too much trouble to split the tiny AR fixes from the new distribution refactoring into just 2 commits so that we don't have to squash everything together?

Sure: #6240

[ricardoV94]

This is great. We have finally achieved V3 parity xD

[ricardoV94]

@junpenglao We use the default PR bullet points for the automatically generated release notes. I'll add it manually ;)

[junpenglao]

@junpenglao We use the default PR bullet points for the automatically generated release notes. I'll add it manually ;)

Thanks! I mindlessly deleted everything when open the PR.