Add support to data type MAP in TrinoTypeCompiler

[dudub12]

Will my attempt to integrate with LangChain and Trino using this library, I countered the following exception:

sqlalchemy.exc.CompileError: (in table 'MY_TABLE', column 'SOME_COLUMN'): Compiler <trino.sqlalchemy.compiler.TrinoTypeCompiler object at 0x110fb7d30> can't render element of type MAP

AttributeError: 'TrinoTypeCompiler' object has no attribute 'visit_MAP'

After some research, I found out that TrinoTypeCompiler doesn't support MAP data type.
I have edited the compiler so it will support visit_MAP function and it worked on my local machine.

Fixes #397

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[hashhar]

Please add a test where you create a table with MAP type and try to do some operation via SQLAlchemy which fails without your change.

[hashhar]

@dudub12 Can you please add a test? This is ready to be merged otherwise.

[hashhar]

Superseded by #448

Thanks for showing the way @dudub12