Fix EXPLAIN ANALYZE for compressed DML

[svenklemm]

EXPLAIN ANALYZE for compressed DML would error out with bogus varno error because we would modify the original expressions of the plan that were still referenced in nodes instead of adjusting copies and using those copies in our internal scans.

Fixes: #6175

[github-actions]

@gayyappan, @antekresic: please review this pull request.

Powered by pull-review

[codecov]

Codecov Report

Merging #6210 (a9d0515) into main (a664e68) will decrease coverage by 0.03%.
Report is 4 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #6210      +/-   ##
==========================================
- Coverage   81.48%   81.45%   -0.03%     
==========================================
  Files         246      246              
  Lines       56978    56939      -39     
  Branches    12626    12610      -16     
==========================================
- Hits        46429    46382      -47     
+ Misses       8166     8147      -19     
- Partials     2383     2410      +27     

Files	Coverage Δ
tsl/src/compression/compression.c	91.63% <100.00%> (+0.12%)	⬆️

... and 46 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[timescale-automation]

Automated backport to 2.12.x not done: cherry-pick failed.

Git status

HEAD detached at origin/2.12.x
You are currently cherry-picking commit 8f3bb0ba7.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	new file:   .unreleased/pr_6210
	modified:   tsl/src/compression/compression.c

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   tsl/test/shared/expected/decompress_tracking.out
	deleted by us:   tsl/test/shared/sql/decompress_tracking.sql

Job log