[2201.10.x] - Use Java exception to notify cannot complete future twice

[ravinperera00]

Purpose

$subject

Fixes #43654

Approach

The use of the BError removes the stacktrace related information because the printStackTrace() method is overridden within the BError class. We could use a Java Exception instead to retain that information.

Check List

• Read the Contributing Guide
• 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]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Please upload report for BASE (2201.10.x@08131a6). Learn more about missing BASE report.
Report is 4 commits behind head on 2201.10.x.

Files with missing lines	Patch %	Lines
.../java/io/ballerina/runtime/internal/BalFuture.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             2201.10.x   #43699   +/-   ##
============================================
  Coverage             ?   77.30%           
  Complexity           ?    58542           
============================================
  Files                ?     3460           
  Lines                ?   220121           
  Branches             ?    28919           
============================================
  Hits                 ?   170168           
  Misses               ?    40545           
  Partials             ?     9408           

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