Capture more operation states and receivers by reference in sender adaptors to use SBO of unique_function

[msimberg]

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[codacy-production]

Coverage summary from Codacy

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Coverage variation	Diff coverage
✅ +0.09% (target: -1.00%)	✅ 92.31% (target: 90.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (ed251f2)	18547	13853	74.69%
Head commit (0013cf9)	18541 (-6)	13865 (+12)	74.78% (+0.09%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1192)	39	36	92.31%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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