Backport to branch(3) : Optimize JDBC storage by using Connection.setReadOnly()

[feeblefakie]

This is an automated request for a manual backport of the following:

• Original PR: Optimize JDBC storage by using Connection.setReadOnly() #2651
• Commit to backport: a763467

1. Resolve any conflicts that occur during the cherry-picking process.

git fetch origin &&
git checkout 3-pull-2651 &&
git cherry-pick --no-rerere-autoupdate -m1 a763467df31151c38810e16c3b0d474b31c509f7

2. Push the changes.
3. Merge this PR after all checks have passed.

Thank you!