DEPR: rename BQ to BQE for offsets #55978
Merged
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xref #55553, #55496, #52064
Deprecated the alias denoting business quarter end frequency
'BQ'for offsets in favour of'BQE'.Renamed strings 'BQ-DEC', 'BQ-JAN', etc. denoting business quarterly frequencies with various fiscal quarter ends to 'BQE-DEC', 'BQE-JAN', etc.