Curly braces in coverpoints must close with the first character of the coverpoint name

@antmarzam is already working on this.

Since May 9, 2025.

This suggestion is followed in Opentitan

Good Example:
```
Covergroup cg;
Bit x;
Cp_name: coverpoint x {
Bins zero = {0};
Bins one = {1};
}
endgroup
```
Bad Examples:
```
Covergroup cg;
Bit x;
Cp_name: coverpoint x {
Bins zero = {0};
Bins one = {1};
}
Endgroup

Covergroup cg;
Bit x;
Cp_name: coverpoint x {Bins zero = {0};
Bins one = {1};
}
Endgroup

Covergroup cg;
Bit x;
Cp_name: coverpoint x {Bins zero = {0};
Bins one = {1};}
Endgroup

```