[Cherry-pick] Add backoff for setting for getting topic policies to branch-2.7

[Technoboy-]

##Motivation
Cherry pick - Add backoff for setting for getting topic policies(#11487, #11560) to branch-2.7.
For some of the methods are different with the master branch, using git cherrypick -x will be failed. So I have to move the changes one by one.

[eolivelli]

Can you please write in the description, and possibly the title, a summary of the changes?

Otherwise it is tricky for people reading the release notes and the commit messages to understand the meaning of this patch.

[eolivelli]

Why didn't you use 'git cherrypick -x'?

If you do it that way there is a better link to the original commits.
If they do not apply cleanly please explain

[Technoboy-]

Can you please write in the description, and possibly the title, a summary of the changes?

Otherwise it is tricky for people reading the release notes and the commit messages to understand the meaning of this patch.

Sorry for this, I have changed the description.

[Technoboy-]

Why didn't you use 'git cherrypick -x'?

If you do it that way there is a better link to the original commits.
If they do not apply cleanly please explain

For some of the methods are different with the master branch, using git cherrypick -x will be failed. So I have to move the changes one by one.

[codelipenghui]

@eolivelli

Why didn't you use 'git cherrypick -x'?

There are too many conflicts with branch-2.7. we are not able to cherry-pick the change from the master branch, so push a PR to fix the branch-2.7 directly.