refactor(binder): refine resolve source schema

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What's changed and what's your intention?

prepare for #10214

• change the syntax to define primary key on source when source's schema is resolved from the external format file. see "## Documentation" for more info
• temporal revert feat(connector): avro key as column #9926 and we will implement it with the new syntax soon https://www.notion.so/risingwave-labs/Source-New-DDL-Design-733c586e98574c0db2e11a1a4ca7dda3

Checklist For Contributors

• 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).
• I have demonstrated that backward compatibility is not broken by breaking changes and created issues to track deprecated features to be removed in the future. (Please refer to the issue)
• All checks passed in ./risedev check (or alias, ./risedev c)

Checklist For Reviewers

• I have requested macro/micro-benchmarks as this PR can affect performance substantially, and the results are shown.

Documentation

• My PR DOES NOT contain user-facing changes.

Types of user-facing changes

• SQL commands, functions, and operators

Release note

** breaking changes**

Previously, users can define the primary key when creating a source or table with a connector whose schema is auto-resolved with the external format definition.

CREATE TABLE debezium_non_compact (order_id INT PRIMARY KEY) with (
    connector = 'kafka',
    kafka.topic = 'debezium_non_compact_avro_json',
    kafka.brokers = 'message_queue:29092',
    kafka.scan.startup.mode = 'earliest'
) ROW FORMAT DEBEZIUM_AVRO ROW SCHEMA LOCATION CONFLUENT SCHEMA REGISTRY 'http://message_queue:8081';

But this syntax actually does not make sense. It defines a column and a column constraint on it, which can be expressed as the relation's schema only having this column
Now we will change it to use the table constraint syntax to make it more

CREATE TABLE debezium_non_compact (PRIMARY KEY(order_id)) with ( ...

[codecov]

Codecov Report

Merging #10195 (a8b43f4) into main (558cef5) will decrease coverage by 0.01%.
The diff coverage is 23.92%.

@@            Coverage Diff             @@
##             main   #10195      +/-   ##
==========================================
- Coverage   70.52%   70.51%   -0.01%     
==========================================
  Files        1255     1255              
  Lines      213963   213947      -16     
==========================================
- Hits       150891   150860      -31     
- Misses      63072    63087      +15     

Flag	Coverage Δ
rust	70.51% <23.92%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
src/frontend/src/handler/create_source.rs	44.70% <21.13%> (+0.35%)	⬆️
src/frontend/src/handler/create_table.rs	90.32% <100.00%> (+0.06%)	⬆️

... and 4 files with indirect coverage changes

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