to 4.0: perf(data-branch): tighten table CTS scan range and undo blockio read filtering (cherry-pick #24371 to 4.0-dev)

[gouhongshen]

Backport of two follow-up commits from #24371 to 4.0-dev.

What type of PR is this?

• API-change
• BUG
• Improvement
• Documentation
• Feature
• Test and CI
• Code Refactoring

Which issue(s) this PR fixes:

issue #21979 (cherry-picked from #24371)

What this PR does / why we need it:

This PR ports the two commits that landed on top of the original #24371 backport:

commit	summary
ad6fb086fe0	perf: tighten data branch table cts scan range
3fbc5fbf9a	revert: undo blockio read commit-ts filtering

Changes

• Tighten the mo_tables.CollectChanges lower bound used by data branch table creation-ts resolution. Instead of scanning from BuildTS(0,1), the code reads the owning database row from mo_database with its catalog primary key and derives a tighter lower bound from created_time.
• Add a mo_tables.__mo_cpkey_col PK filter while resolving the table creation commit timestamp, so CollectChanges can prune unrelated catalog rows.
• Keep the existing 4.0-dev Reader fallback path for table creation-ts resolution.
• Undo the blockio read commit-ts filtering changes from the three earlier read-path commits, including the now-dead LoadColumnsWithMeta helper and related tests.

4.0-dev conflict notes

• 4.0-dev does not have the main-branch CollectChangesDebugLabel / PKReplaySpec context used by ad6fb086fe0, so this backport keeps the 4.0-dev PK filter shape and does not introduce those unrelated APIs.
• pkg/fileservice/concurrent_read_oom_test.go is already deleted on 4.0-dev; the source commit only changed one comment in that file, so this PR keeps the file deleted.

Verification on 4.0-dev

• source $HOME/.zshrc && moenv && go test ./pkg/frontend -run 'Test(PackMoDatabaseCPKey|DatabaseCreatedTimeToCollectLowerBound|TryBuildCurrentMoTablesCPKeyFilter)'
• source $HOME/.zshrc && moenv && go test ./pkg/vm/engine/tae/blockio ./pkg/objectio/ioutil -run '^$'
• source $HOME/.zshrc && moenv && go test ./pkg/vm/engine/tae/blockio

Special notes for your reviewer:

• This is a focused follow-up backport for fix(data-branch): unify diff/merge collect-range over arbitrary DAG depth #24371 after to 4.0: fix(data-branch): unify diff/merge collect-range over arbitrary DAG depth (cherry-pick #24371 to 4.0-dev) #24378.
• The diff_12.sql CI runtime improved from roughly 145s to roughly 4s after the data branch lower-bound optimization.
• Original PR: fix(data-branch): unify diff/merge collect-range over arbitrary DAG depth #24371

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