feat: introduce rw_worker_nodes, rw_parallel_units and support show clusters command

[yezizp2012]

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What's changed and what's your intention?

Related #8803.

1. introduce system tables rw_worker_nodes and rw_parallel_units:

• rw_worker_nodes

Field	Type	Description
id	Int32	Unique identifier of the worker node
host	Varchar	Host of the worker node
port	Varchar	Serving port of the worker node
type	Varchar	Type of the worker node
state	Varchar	State of the worker node, should be one of [RUNNING, STARTING]
parallelism	Int32	Streaming parallelism of the worker node
is_streaming	Boolean	Whether the worker node is in streaming mode
is_serving	Boolean	Whether the worker node is in batch serving mode
is_unschedulable	Boolean	Whether the worker node is unschedulable for streaming job

• rw_parallel_units

Field	Type	Description
id	Int32	Unique identifier of the parallel unit
worker_id	Int32	Identifier of the worker id that the parallel unit belongs to

2. support command show clusters:

dev=> show clusters;
      Addr      |  State  |     Parallel Units     | Is Streaming | Is Serving | Is Unschedulable
----------------+---------+------------------------+--------------+------------+------------------
 127.0.0.1:5688 | RUNNING | 3000, 3001, 3002, 3003 | true         | true       | false
(1 row)

3. change type of columns in rw_sources to array type of varchar and remove column primary_keys.
4. change type of arg_type_ids in rw_functions to array type of integer.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• All checks passed in ./risedev check (or alias, ./risedev c)

Documentation

• My PR contains user-facing changes.

Click here for Documentation

Types of user-facing changes

Please keep the types that apply to your changes, and remove the others.

• SQL commands, functions, and operators

Release note

1. introduce system tables rw_worker_nodes and rw_parallel_units.
2. support command SHOW CLUSTERS.
3. remove primary_keys in rw_sources.

[yezizp2012]

Some examples of a local run:

dev=> select * from rw_worker_nodes;
  id  |   host    | port |     type     |  state  | parallelism | is_streaming | is_serving | is_unschedulable
------+-----------+------+--------------+---------+-------------+--------------+------------+------------------
 3001 | 127.0.0.1 | 5688 | COMPUTE_NODE | RUNNING |           4 | t            | t          | f
(1 row)

dev=> show clusters;
      Addr      |  State  |     Parallel Units     | Is Streaming | Is Serving | Is Unschedulable
----------------+---------+------------------------+--------------+------------+------------------
 127.0.0.1:5688 | RUNNING | 3000, 3001, 3002, 3003 | true         | true       | false
(1 row)

dev=> select * from rw_parallel_units ;
  id  | worker_id
------+-----------
 3000 |      3001
 3001 |      3001
 3002 |      3001
 3003 |      3001
(4 rows)

[codecov]

Codecov Report

Merging #10656 (297acee) into main (0ede620) will decrease coverage by 0.03%.
The diff coverage is 18.78%.

@@            Coverage Diff             @@
##             main   #10656      +/-   ##
==========================================
- Coverage   70.22%   70.19%   -0.03%     
==========================================
  Files        1280     1282       +2     
  Lines      220315   220452     +137     
==========================================
+ Hits       154718   154753      +35     
- Misses      65597    65699     +102     

Flag	Coverage Δ
rust	70.19% <18.78%> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
...ntend/src/catalog/system_catalog/rw_catalog/mod.rs	0.00% <0.00%> (ø)
src/frontend/src/handler/show.rs	27.31% <0.00%> (-4.41%)	⬇️
src/meta/src/manager/cluster.rs	70.24% <ø> (ø)
src/sqlparser/src/ast/mod.rs	85.03% <0.00%> (-0.07%)	⬇️
src/sqlparser/src/keywords.rs	100.00% <ø> (ø)
src/sqlparser/src/parser.rs	86.81% <0.00%> (-0.03%)	⬇️
src/frontend/src/catalog/system_catalog/mod.rs	45.20% <100.00%> (+0.76%)	⬆️
.../catalog/system_catalog/rw_catalog/rw_functions.rs	100.00% <100.00%> (ø)
...rc/catalog/system_catalog/rw_catalog/rw_sources.rs	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

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[st1page]

LGTM, up to you @BugenZhao

[BugenZhao]

LGTM.