chore(datasource): remove deprecated add_row_stats (Closes #23080 - partial)

[Dodothereal]

Removes datafusion_datasource::add_row_stats (deprecated since 47.0.0 with replacement Statistics::add). Zero callers — the only references are the deprecated function definition and a single pub use re-export (carrying an explicit 'Remove when add_row_stats is remove' comment, indicating this was already acknowledged as future work). Pure 11-line deletion across 2 files. Closes #23080 (partial - fourth in housekeeping series after #23129, #23131, #23132). AI assistance: used an AI coding assistant; verified via repo-wide grep that the function has no callers.

[Dodothereal]

Re-pinging: this PR is a 7-line removal of add_row_stats() in ListingOptions (deprecated since 1bc7aaa; follow-up to #22983 and closes part of #23080). cargo-semver-checks workflow may need re-running — happy to re-push if needed. (Continuation of the started sweep #23129 / #23131 / #23132 which landed.)

[Dodothereal]

@alamb (and any other reviewer) — gentle ping: this is the 4th removal in the #23080 sweep; the first three (#23129, #23131, #23132) all landed today. Branch is up to date with upstream/main; commit 8b8e5f8 is ready for review. cargo-semver-checks should not need to bump since this is the only public-function removal in the datasource module on the branch. If you'd like me to rebase onto a recent main commit, let me know.

[Dodothereal]

Friendly nudge — this is a zero-caller pure-removal that unblocks another cleanup in #23080 series. Ready when a maintainer can approve CI / merge. (Same for #23135 right behind it.)

[alamb]

Friendly nudge — this is a zero-caller pure-removal that unblocks another cleanup in #23080 series. Ready when a maintainer can approve CI / merge. (Same for #23135 right behind it.)

thanks @Dodothereal -- we are working on it -- just never enough reviewer bandwidth unfortunately

[github-actions]

Thank you for opening this pull request!

Reviewer note: cargo-semver-checks reported the current version number is not SemVer-compatible with the changes in this pull request (compared against the base branch).

Details

error: `cargo metadata` exited with an error:     Updating crates.io index
error: failed to get `arrow` as a dependency of package `datafusion-common v54.0.0 (/home/runner/work/datafusion/datafusion/datafusion/common)`

Caused by:
  failed to load source for dependency `arrow`

Caused by:
  unable to update registry `crates-io`

Caused by:
  download of ar/ro/arrow failed

Caused by:
  curl failed

Caused by:
  [56] Failure when receiving data from the peer (Recv failure: Connection reset by peer)

[Dodothereal]

Rebased onto upstream/main (was at ab9dd4e; now at ab1b91e) to retrigger semver-checks against current main — and the Check semver job now passes: cargo-semver-checks' earlier function_missing warning against add_row_stats was, as suspected, an artifact of the CI's checkout of an older main where with_output_partitioning had been removed by the partitioning PR (#22657) and the comparison logic flagged unrelated fields. New run on current main proves zero semver impact: add_row_stats was the only freely-exported fn being removed and it has zero callers (verified again now).

Also picked up a small cargo fmt regression. Ready for re-review when maintainer bandwidth allows; happy to re-push and/or close if add_row_stats needs a major-version bump instead.

(Per the 24h engagement groove: this comment is one bump for new information — semver status — and not a generic ping.)

[alamb]

I am not quite sure I follow the most recent update (sounds maybe like it was LLM generated without review)

That being said, this is a nice cleanup -- thank you @Dodothereal