Apply type inference in SOAP responses

[Nuvindu]

Purpose

Fixes: #5711

Examples

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec
• Checked native-image compatibility

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (e88443c) 93.04% compared to head (14d1d13) 96.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #112      +/-   ##
==========================================
+ Coverage   93.04%   96.33%   +3.29%     
==========================================
  Files          12       12              
  Lines         388      409      +21     
  Branches      269      283      +14     
==========================================
+ Hits          361      394      +33     
+ Misses         27       15      -12     

Files	Coverage Δ
ballerina/modules/wssec/ws_security_methods.bal	95.79% <100.00%> (+0.42%)	⬆️
ballerina/modules/soap11/soap11.bal	97.43% <91.66%> (+6.52%)	⬆️
ballerina/modules/soap12/soap12.bal	95.12% <92.85%> (+18.80%)	⬆️
ballerina/soap_utils.bal	96.89% <95.83%> (+2.36%)	⬆️

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