Types are not checked when building `case` expression

[HaoYang670]

Describe the bug
A clear and concise description of what the bug is.
The type of case expression is not checked when building the plan.

To Reproduce

DataFusion CLI v15.0.0
❯ create table t as select 2 as a;
0 rows in set. Query took 0.013 seconds.
❯ select case
    when a = 1 then true
    when a = 2 then 'abc'
    else 123
  end  
from t;
Internal("The type of Boolean AND Utf8 of binary physical should be same")

Expected behavior
We should return a DatafusionError::Plan(...), instead of an Internal error.

Additional context
The CaseBuilder does some type checking, but it seems that it is bypassed.
https://github.com/apache/arrow-datafusion/blob/c2f199adbec8b650de5668c97675f8a757607df8/datafusion/expr/src/conditional_expressions.rs#L100-L110

• Check when expr
• Check then and else

[HaoYang670]

Blocked by #4615

[HaoYang670]

test on pg: https://onecompiler.com/postgresql/3z4rdp5g9

[HaoYang670]

Close it as this has been fixed by #5820.