add EXPLAIN ANALYZE fields; update follower read example

[taroface]

DOC-10507 DOC-10506 DOC-10396 DOC-10395

• Updated EXPLAIN ANALYZE tables and example output with new fields in 24.3
• Added some fields that were not previously documented
• Added example to Follower Reads doc

[github-actions[bot]]

Files changed:

• src/current/v24.3/explain-analyze.md
• src/current/v24.3/follower-reads.md
• src/current/v24.3/set-transaction.md

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