refactor(meta): unify create_table with create_stream_job

[BugenZhao]

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What's changed and what's your intention?

• Remove the create_table_inner and unify it into create_stream_job.
• Extract a visit_fragment utility and use it for filling source IDs / streaming job IDs.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

• Tracking: table schema change #6903

[codecov]

Codecov Report

Merging #7266 (e24e792) into main (5d25f9c) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #7266      +/-   ##
==========================================
+ Coverage   73.01%   73.03%   +0.01%     
==========================================
  Files        1066     1066              
  Lines      170202   170172      -30     
==========================================
  Hits       124277   124277              
+ Misses      45925    45895      -30     

Flag	Coverage Δ
rust	73.03% <0.00%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
src/meta/src/lib.rs	2.38% <ø> (ø)
src/meta/src/manager/streaming_job.rs	0.00% <0.00%> (ø)
src/meta/src/rpc/service/ddl_service.rs	3.08% <0.00%> (+0.14%)	⬆️
src/meta/src/stream/stream_graph.rs	69.45% <0.00%> (+0.55%)	⬆️
...torage/src/hummock/local_version/pinned_version.rs	88.30% <0.00%> (-0.59%)	⬇️
src/meta/src/hummock/mock_hummock_meta_client.rs	65.78% <0.00%> (-0.53%)	⬇️
src/common/src/types/ordered_float.rs	31.25% <0.00%> (+0.19%)	⬆️
...frontend/src/scheduler/hummock_snapshot_manager.rs	60.47% <0.00%> (+0.47%)	⬆️

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[yezizp2012]

LGTM

[xx01cyx]

LGTM