[BUG] Edge attribute assignment without default

[kugesan1105]

Issue

• Unable to create edge with attribute value assignment when attribute has no default value.

To Reproduce

node node_a {
    has val: int;
}

edge Edge_a {
    # has value2: int ;      
    has value2: int = 30;
}


with entry {

    root +:Edge_a:value2=30:+> (node_a(val=9));
    print([root-:Edge_a:->]);

}

Description
When creating an edge with attribute value assignment, but the attribute has no default value defined, an error occurs. Assigning values to attributes without defaults should be allowed.