refactor(meta): support DAG fragment graph

[skyzh]

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

What's changed and what's your intention?

Previously, we only supports a tree-like fragment graph. Now we refactor it to support any DAG.

• Use topology sort to construct actors from fragments.
• Fully support multi-dispatcher per fragment / per actor.
• Differentiate local actor id and global actor id, generate all ids in batch.

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 #1751

[yezizp2012]

LSTM!

[codecov]

Codecov Report

Merging #1789 (18b5bed) into main (6b68bf1) will decrease coverage by 0.00%.
The diff coverage is 92.35%.

@@            Coverage Diff             @@
##             main    #1789      +/-   ##
==========================================
- Coverage   71.33%   71.33%   -0.01%     
==========================================
  Files         605      605              
  Lines       78729    79168     +439     
==========================================
+ Hits        56163    56474     +311     
- Misses      22566    22694     +128     

Flag	Coverage Δ
rust	71.33% <92.35%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
src/meta/src/rpc/service/ddl_service.rs	0.00% <0.00%> (ø)
src/meta/src/rpc/service/stream_service.rs	0.00% <0.00%> (ø)
src/meta/src/model/mod.rs	95.58% <76.08%> (-2.84%)	⬇️
src/meta/src/stream/graph/stream_graph.rs	70.31% <92.41%> (+12.04%)	⬆️
src/meta/src/stream/fragmenter.rs	96.20% <95.00%> (+3.16%)	⬆️
src/meta/src/stream/graph/fragment_graph.rs	96.94% <96.36%> (-0.32%)	⬇️
src/meta/src/stream/test_fragmenter.rs	99.60% <100.00%> (+<0.01%)	⬆️
src/sqlparser/src/ast/statement.rs	82.87% <0.00%> (-4.80%)	⬇️
src/meta/src/stream/stream_manager.rs	72.50% <0.00%> (-3.26%)	⬇️
src/frontend/src/handler/create_source.rs	97.45% <0.00%> (-1.87%)	⬇️
... and 25 more

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