The `int()` function incorrectly handles non-integer numbers about dsc

[tgauth]

The root cause of this issue is within the tree-sitter-dscexpression grammar, so this will apply to other functions as well. For numbers, the grammar only expects an int based on https://learn.microsoft.com/en-US/azure/azure-resource-manager/templates/data-types.

[michaeltlombardi]

Should we raise an error when a user inputs a number with a fractional part for the function then, instead of returning the fractional part as an integer? I'm open to the fix being either raising a specific error or correcting the grammar to parse the number and return the integer without the fractional part.