Improve Result Coercion to Comply with the Spec

[ThisaruGuruge]

Purpose

$Subject

Fixes: #1988
Fixes: #2041
Fixes: #2042

Examples

Checklist

• Linked to an issue
• Updated the changelog
• Added tests

[codecov]

Codecov Report

Merging #446 (b4a3ce1) into master (7eacc7f) will increase coverage by 0.11%.
The diff coverage is 96.18%.

@@             Coverage Diff              @@
##             master     #446      +/-   ##
============================================
+ Coverage     94.51%   94.63%   +0.11%     
- Complexity      286      287       +1     
============================================
  Files            50       50              
  Lines          2788     2831      +43     
  Branches       1338     1360      +22     
============================================
+ Hits           2635     2679      +44     
+ Misses          132      131       -1     
  Partials         21       21              

Impacted Files	Coverage Δ
ballerina/executor_visitor.bal	90.69% <ø> (ø)
ballerina/records.bal	73.68% <ø> (ø)
ballerina/response_formatter.bal	95.41% <95.41%> (ø)
ballerina/common_utils.bal	95.89% <100.00%> (+0.11%)	⬆️
ballerina/engine.bal	98.41% <100.00%> (ø)
...dlib/graphql/runtime/engine/ResponseGenerator.java	99.09% <100.00%> (+<0.01%)	⬆️
...ina/stdlib/graphql/runtime/schema/FieldFinder.java	98.75% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7eacc7f...b4a3ce1. Read the comment docs.

[shafreenAnfar]

LGTM