Fix circuit ordering in InterleavedRB (backport #1191) #1194
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### Summary Changes the ordering of circuits generated by `InterleavedRB` back to RIRIRI (R: Reference, I: Interleaved) order. It was accidentally changed into RRRIII order in #898. Before that, it had been RIRIRI order. ### Details and comments This change may slightly alter the impact of noise on IRB results. RIRIRI ordering is preferable in the sense that it minimizes the impact of drift or noise fluctuations. Note that `InterleavedRBAnalysis` is not changed that means it works correctly regardless of the circuit ordering because it processes data relying on "interleaved" flag in circuit metadata. This commit also adds a new experiment option `circuit_order` to `InterleavedRB`. It enables to change the order of the reference and the interleaved circuits and hence slightly alter the impact of noise on interleaved RB results. The default value is set to `"RIRIRI"`. (cherry picked from commit c6753f3)
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Changelog: Bugfix
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Jun 29, 2023
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This is an automatic backport of pull request #1191 done by Mergify.
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