[SPARK-21102][SQL] Refresh command is too aggressive in parsing

### Idea

This PR adds validation to REFRESH sql statements. Currently, users can specify whatever they want as resource path. For example, spark.sql("REFRESH ! $ !") will be executed without any exceptions.

### Implementation

I am not sure that my current implementation is the most optimal, so any feedback is appreciated. My first idea was to make the grammar as strict as possible. Unfortunately, there were some problems. I tried the approach below:

SqlBase.g4
```
...
    | REFRESH TABLE tableIdentifier                                    #refreshTable
    | REFRESH resourcePath                                             #refreshResource
...

resourcePath
    : STRING
    | (IDENTIFIER | number | nonReserved | '/' | '-')+ // other symbols can be added if needed
    ;
```
It is not flexible enough and requires to explicitly mention all possible symbols. Therefore, I came up with the current approach that is implemented in the code.

Let me know your opinion on which one is better.

Author: aokolnychyi <anton.okolnychyi@sap.com>

Closes #18368 from aokolnychyi/spark-21102.