Adjust serialized query buffer sizes

[Shelnutt2]

This change the client/server flow to always send the server the original user requested buffer sizes. This solves a bug in which with serialized queries incompletes would cause the "server" to use smaller buffers for each iteration of the incomplete query. This yield decreasing performance as the buffers approached zero. The fix here lets the server always get the original user's buffer size.

TYPE: BUG
DESC: Always use original buffer size in serialized read queries serverside.

[shortcut-integration]

This pull request has been linked to Clubhouse Story #5476: Incomplete queries which round trip through serialization have decreasing buffer sizes.

[github-actions]

The backport to release-2.2 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-release-2.2 release-2.2
# Navigate to the new working tree
cd .worktrees/backport-release-2.2
# Create a new branch
git switch --create backport-2115-to-release-2.2
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick ---mainline 1 963f91b72c40933a593a5f4d4026359ad52f7556
# Push it to GitHub
git push --set-upstream origin backport-2115-to-release-2.2
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-release-2.2

Then, create a pull request where the base branch is release-2.2 and the compare/head branch is backport-2115-to-release-2.2.