Add missing pos and WS to identifier node

[rdhananjaya]

Purpose

$subject

Fixes #19472 (Need to verify with tooling team)

Approach

Describe how you are implementing the solutions along with the design details.

Samples

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Remarks

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Check List

• Read the Contributing Guide
• Required Balo version update
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[codecov-io]

Codecov Report

Merging #19532 into ballerina-1.0.x will not change coverage.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           ballerina-1.0.x   #19532   +/-   ##
================================================
  Coverage            15.73%   15.73%           
================================================
  Files                   47       47           
  Lines                 1265     1265           
  Branches               197      197           
================================================
  Hits                   199      199           
  Misses                1053     1053           
  Partials                13       13

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