feat(streaming): support multiple dispatchers on compute node

[skyzh]

Signed-off-by: Alex Chi iskyzh@gmail.com

What's changed and what's your intention?

As title

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

close #865
ref #719

[codecov]

Codecov Report

Merging #1879 (bdaaceb) into main (f3f296a) will increase coverage by 0.01%.
The diff coverage is 29.03%.

@@            Coverage Diff             @@
##             main    #1879      +/-   ##
==========================================
+ Coverage   70.60%   70.61%   +0.01%     
==========================================
  Files         611      611              
  Lines       79958    79957       -1     
==========================================
+ Hits        56451    56459       +8     
+ Misses      23507    23498       -9     

Flag	Coverage Δ
rust	70.61% <29.03%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/stream/src/task/stream_manager.rs	0.00% <0.00%> (ø)
src/stream/src/executor/dispatch.rs	76.31% <78.94%> (-0.17%)	⬇️
src/stream/src/executor/integration_tests.rs	95.75% <100.00%> (+0.05%)	⬆️
src/common/src/types/ordered_float.rs	23.70% <0.00%> (+0.19%)	⬆️

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[BugenZhao]

LGTM