Clarify misleading CCS compatibility table (elastic#2395)

This PR updates the CCS compatibility table to improve clarity,
maintainability, and reusability across the documentation.

## Summary of changes

- Expanded the table to list compatibility for each individual
Elasticsearch version instead of merging adjacent version ranges. This
addresses confusion around edge cases and exact version compatibility.

- Removed an incorrect example that claimed a local 9.0 cluster can
search a remote 8.19 cluster.

- Moved the compatibility matrix into its own snippet (just the table,
without notes or extra details) so it can be reused in multiple places,
including the Solution section.

- Removed the compatibility table from
solution/search/cross-cluster-search.md to avoid duplication. (refers to
the new snippet instead)

- Added usage notes at the top of both updated snippets to document
where they are reused.

### Advantages of these changes

- There is now only one compatibility table to maintain across the
documentation.

- Resolves the original issue where the table was misleading for some
users.

- Improves reusability by allowing the table to be embedded wherever
needed.

### Things to note

- The original “small” table in the Deploy and manage section was more
compact and included versions 5.0 to 9.0.

- The new table is larger and only covers 7.17 to 9.1.

Connected to elastic#1490

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Co-authored-by: florent-leborgne <[email protected]>

Author: charlotte-hoblik