planner: rename stable-result-mode to ordered-result-mode (#26093)

[ti-srebot]

cherry-pick #26093 to release-4.0
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/26133

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/tidb.git pr/26133:release-4.0-0db5df550b65

---

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary: planner: rename stable-result-mode to ordered-result-mode

What is changed and how it works?

planner: rename stable-result-mode to ordered-result-mode

Check List

Tests

• Unit test

Release note

• No release note

[ti-srebot]

/run-all-tests

[ti-srebot]

@qw4990 you're already a collaborator in bot's repo.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• Reminiscent
• rebelice

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[zhouqiang-cl]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 3e621cc

[zhouqiang-cl]

/merge

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