[dbnode] TestReuseStreamingWriter

[linasm]

What this PR does / why we need it:
Test case for #3664 fix.

Special notes for your reviewer:

Does this PR introduce a user-facing and/or backwards incompatible change?:
NONE

Does this PR require updating code package or user-facing documentation?:
NONE

[codecov]

Codecov Report

Merging #3666 (4525d2e) into master (ad5a4fd) will decrease coverage by 0.2%.
The diff coverage is n/a.

❗ Current head 4525d2e differs from pull request most recent head 05004d0. Consider uploading reports for the commit 05004d0 to get more accurate results

@@           Coverage Diff            @@
##           master   #3666     +/-   ##
========================================
- Coverage    56.4%   56.1%   -0.3%     
========================================
  Files         551     551             
  Lines       62554   61889    -665     
========================================
- Hits        35287   34760    -527     
+ Misses      24096   23997     -99     
+ Partials     3171    3132     -39     

Flag	Coverage Δ
aggregator	57.1% <ø> (ø)
cluster	∅ <ø> (∅)
collector	58.4% <ø> (ø)
dbnode	60.7% <ø> (-0.3%)	⬇️
m3em	46.4% <ø> (ø)
metrics	19.8% <ø> (ø)
msg	74.2% <ø> (-0.2%)	⬇️

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