planner: cherry-pick multi alternative framework and fts like rewrite back to fts branch | tidb-test=42c2474b6e2e1ef3430d07a1743ca7e17fd97acc tiflash=feature-fts tikv=feature-fts #68383

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.