[Improvement]: Support Interpolation for XML Namespace Declarations

[Ajai-Suvendran]

Description

Currently, Ballerina does not support interpolation for defining XML namespaces dynamically. For instance, the following code snippet results in a compilation error:
xml:Element element = ;
This limitation makes it challenging to set XML namespaces dynamically based on runtime values or configurations. Instead, developers are forced to hardcode the namespace or resort to workarounds, such as constructing the XML element using string manipulation or additional steps.

Adding support for namespace interpolation would simplify the creation of XML documents with dynamic namespaces and improve developer experience. This functionality would align with Ballerina's goal of providing seamless XML handling capabilities.

Describe your problem(s)

No response

Describe your solution(s)

No response

Related area

-> Standard Library

Related issue(s) (optional)

No response

Suggested label(s) (optional)

No response

Suggested assignee(s) (optional)

No response