[Bug]: Can't provide a value to a configurable variable via the CLI when there are other configurable variables for which values cannot be provided via the CLI

[MaryamZi]

Description

$title.

Also, why can't we provide a value for variables of types like int? via the CLI? Here, we surely can support at least int values, even if we don't support nil?

Steps to Reproduce

import ballerina/io;

configurable int v1 = 1;
configurable int? v2 = ();

public function main() {
    io:println(v1);
    io:println(v2);
}

$ bal run test.bal -- -Cv1=1 
Compiling source
        test.bal

Running executable

error: value for configurable variable 'v2' with type 'int?' is not supported as a command line argument
        at .:0.0.0(test.bal:4)

Affected Version(s)

2201.9.0

OS, DB, other environment details and versions

No response

Related area

-> Runtime

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