[branch-50] Backport: Fix docs.rs build: Replace auto_doc_cfg with doc_cfg #17890
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Which issue does this PR close?
Closes #17889
50.2.0(minor) #17849auto_doc_cfgwithdoc_cfg#17845Fixes an issue in building docs, which are broken in the 50.1.0 release.
Rationale for this change
Fixes docs build.
What changes are included in this PR?
Use doc_cfg instead of auto_doc_cfg.
Are these changes tested?
Yes, see original PR
Are there any user-facing changes?
No