feat(frontend): support show indexes

[chenzl25]

I hereby agree to the terms of the RisingWave Labs, Inc. Contributor License Agreement.

What's changed and what's your intention?

• Support SHOW INDEXES FROM t. Resolve support command: SHOW INDEXES #9046.

Example

dev=> show indexes from sbtest1;
 Name |   On    |      Key      | Include | Distributed By
------+---------+---------------+---------+----------------
 k_1  | sbtest1 | k ASC, id ASC | c, pad  | k
 ck_1 | sbtest1 | k ASC, id ASC | c, pad  | k
(2 rows)

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.

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

• Support SHOW INDEXES FROM t.

[yezizp2012]

LGTM!!

[codecov]

Codecov Report

Merging #9835 (3d2e357) into main (59c6165) will decrease coverage by 0.03%.
The diff coverage is 36.15%.

@@            Coverage Diff             @@
##             main    #9835      +/-   ##
==========================================
- Coverage   71.03%   71.01%   -0.03%     
==========================================
  Files        1247     1247              
  Lines      208418   208510      +92     
==========================================
+ Hits       148055   148067      +12     
- Misses      60363    60443      +80     

Flag	Coverage Δ
rust	71.01% <36.15%> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
src/frontend/src/handler/show.rs	32.15% <0.00%> (-4.73%)	⬇️
src/frontend/src/handler/util.rs	78.64% <0.00%> (-9.91%)	⬇️
src/sqlparser/src/keywords.rs	100.00% <ø> (ø)
src/sqlparser/src/parser.rs	86.73% <66.66%> (-0.02%)	⬇️
src/frontend/src/handler/describe.rs	76.12% <71.42%> (-3.98%)	⬇️
src/frontend/src/catalog/index_catalog.rs	79.05% <100.00%> (+7.49%)	⬆️
src/sqlparser/src/ast/mod.rs	85.92% <100.00%> (+0.01%)	⬆️

... and 10 files with indirect coverage changes

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