Propagate more ReadOptions to ApproximateOffsetOf/Sizes

[pdillinger]

Summary: Unknown why these would ignore options like deadline and read_tier. Setting total_order_seek=true is unnecessary because of the disable_prefix_seek (= true) parameter to NewIndexIterator. This is only used by the hash index, which uses total order seek if either the ReadOption or the parameter is true. The parameter is arguably redundant with the total_order_seek option, meaning it could be eliminated, but I think this case is exceptional (compared to e.g. no_io):

• Prefix seek is particular to user iterators, though might be usable, carefully, for other read operations.
• The historical default of total_order_seek=false in a sense is "wrong result by default" so cannot be interpreted as an intent to force prefix seek in an operation for which it might be usual or give bad results.

Also added a generic release note to cover this and related PRs.

Test Plan: existing tests

[facebook-github-bot]

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[facebook-github-bot]

@pdillinger merged this pull request in facebook/rocksdb@3abcba8470d090dacf8f9a55bb6feec0ec640355.