feat: support window union for cluster mode/request mode

[aceforeverd]

enable window union for cluster/request mode, close #1828

Though toydb_toydb_engine_test passes, it seems not properly emulate the cluster environment. We currently only test cluster/request case through sql_cluster_test. Standalone test in sql engine should be supported anyway later.

[github-actions]

SDK Test Report

  75 files    75 suites   6m 32s ⏱️
176 tests 173 ✔️ 3 💤 0 ❌
217 runs  214 ✔️ 3 💤 0 ❌

Results for commit 8cbbfa7.

♻️ This comment has been updated with latest results.

[github-actions]

HybridSE Linux Test Report

       67 files       235 suites   6m 23s ⏱️
19 059 tests 19 057 ✔️ 2 💤 0 ❌

Results for commit 8cbbfa7.

♻️ This comment has been updated with latest results.

[github-actions]

HybridSE Mac Test Report

       67 files       235 suites   6m 27s ⏱️
19 059 tests 19 057 ✔️ 2 💤 0 ❌

Results for commit 8cbbfa7.

♻️ This comment has been updated with latest results.

[github-actions]

Linux Test Report

       57 files       187 suites   1h 7m 47s ⏱️
  8 549 tests   8 541 ✔️ 8 💤 0 ❌
12 535 runs  12 527 ✔️ 8 💤 0 ❌

Results for commit 8cbbfa7.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Merging #1855 (8cbbfa7) into main (b8ff05e) will increase coverage by 0.01%.
The diff coverage is 7.69%.

@@             Coverage Diff              @@
##               main    #1855      +/-   ##
============================================
+ Coverage     73.74%   73.76%   +0.01%     
  Complexity      347      347              
============================================
  Files           614      615       +1     
  Lines        120314   120394      +80     
  Branches       1015     1021       +6     
============================================
+ Hits          88731    88810      +79     
- Misses        31374    31375       +1     
  Partials        209      209              

Impacted Files	Coverage Δ
hybridse/include/base/iterator.h	100.00% <ø> (ø)
hybridse/include/codec/row.h	80.00% <0.00%> (-14.12%)	⬇️
hybridse/src/vm/runner.cc	67.87% <ø> (+0.06%)	⬆️
src/catalog/distribute_iterator.cc	88.29% <0.00%> (-3.93%)	⬇️
src/catalog/distribute_iterator.h	60.00% <0.00%> (+8.27%)	⬆️
src/sdk/sql_cluster_router.cc	55.14% <100.00%> (+0.17%)	⬆️
hybridse/include/base/spin_lock.h	66.66% <0.00%> (-33.34%)	⬇️
...s/query_response_time/deploy_query_response_time.h	81.25% <0.00%> (-18.75%)	⬇️
...atistics/query_response_time/query_response_time.h	78.26% <0.00%> (-4.35%)	⬇️
.../query_response_time/deploy_query_response_time.cc	97.10% <0.00%> (-2.90%)	⬇️
... and 30 more

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[aceforeverd]

window union across tables

[zhanghaohit]

LGTM