feat(parser): parse lambda function (take 2)

[TennyZhuang]

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

What's changed and what's your intention?

Use |x| x + 1 as syntax to avoid ambiguity

Resolve #11838

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).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

• My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

• My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[codecov]

Codecov Report

Merging #11888 (b311800) into main (9c89aa0) will increase coverage by 0.00%.
Report is 3 commits behind head on main.
The diff coverage is 93.33%.

@@           Coverage Diff           @@
##             main   #11888   +/-   ##
=======================================
  Coverage   70.20%   70.20%           
=======================================
  Files        1375     1375           
  Lines      229075   229090   +15     
=======================================
+ Hits       160813   160827   +14     
- Misses      68262    68263    +1     

Flag	Coverage Δ
rust	70.20% <93.33%> (+<0.01%)	⬆️

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

Files Changed	Coverage Δ
src/meta/src/manager/catalog/utils.rs	48.79% <0.00%> (-0.17%)	⬇️
src/sqlparser/src/ast/mod.rs	85.36% <100.00%> (+0.07%)	⬆️
src/sqlparser/src/parser.rs	86.55% <100.00%> (+0.02%)	⬆️

... and 2 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[xiangjinwu]

To clarify, this means | cannot be used as a prefix operator in future version (builtin or create operator)

Update: a PostgreSQL-compatible workaround exists: operator(pg_catalog.|) operand or operator(public.|) operand