Provide code actions to fix the invalid access of mutable storage in an isolated function

[nipunayf]

Purpose

$title.

Fixes #42331

Approach

Modified the existing add isolated qualifier and make variable immutable code actions to fix the diagnostic invalid access of mutable storage in an 'isolated' function (BCE3943).

Samples

Make the variable immutable

Screen.Recording.2024-05-08.at.3.51.32.PM.mov

Make the variable isolated

Screen.Recording.2024-05-08.at.3.51.41.PM.mov

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 73.13433% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 77.26%. Comparing base (d608958) to head (98b8c03).
Report is 9 commits behind head on master.

Files	Patch %	Lines
...tion/providers/AddIsolatedQualifierCodeAction.java	59.25%	4 Missing and 7 partials ⚠️
...ion/providers/MakeVariableImmutableCodeAction.java	82.50%	4 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #42708      +/-   ##
============================================
- Coverage     77.26%   77.26%   -0.01%     
- Complexity    51298    51303       +5     
============================================
  Files          2928     2929       +1     
  Lines        204391   204423      +32     
  Branches      26659    26668       +9     
============================================
+ Hits         157922   157939      +17     
- Misses        37887    37897      +10     
- Partials       8582     8587       +5     

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