Fix LS fast-run to show compiler diagnostics and fail-fast on compilation errors

[NipunaRanasinghe]

Purpose

$subject.

Fixes #43734

Approach

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

Samples

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Remarks

List any other known issues, related PRs, TODO items, or any other notes related to the PR.

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 53.65854% with 19 lines in your changes missing coverage. Please review.

Project coverage is 77.41%. Comparing base (d8a9cfa) to head (cbab642).
Report is 21 commits behind head on master.

Files with missing lines	Patch %	Lines
...angserver/workspace/BallerinaWorkspaceManager.java	57.89%	5 Missing and 3 partials ⚠️
...lang/langserver/command/executors/RunExecutor.java	56.25%	5 Missing and 2 partials ⚠️
...lerinalang/debugadapter/JBallerinaDebugServer.java	20.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #43735      +/-   ##
============================================
- Coverage     77.42%   77.41%   -0.01%     
- Complexity    58622    58626       +4     
============================================
  Files          3445     3446       +1     
  Lines        219172   219214      +42     
  Branches      28968    28973       +5     
============================================
+ Hits         169690   169703      +13     
- Misses        40052    40073      +21     
- Partials       9430     9438       +8     

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