[Bug]: No runtime error for invalid character range in regex

[SasinduDilshara]

Description

Consider following code

import ballerina/lang.regexp;

public function main() returns error? {
    // regexp:RegExp _ = re `[z-a]`; // compile error: start char code is greater than end char code(BCE4035)
    regexp:RegExp _ = check regexp:fromString("[z-a]"); // no error
}

This should be a runtime error because z-a is a invalid range.

Steps to Reproduce

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Affected Version(s)

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OS, DB, other environment details and versions

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Related area

-> Runtime

Related issue(s) (optional)

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[github-actions]

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      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.