Fix completions in qualified name reference context

[mindula]

Purpose

This PR adds missing completions in qualified name reference context.

Fixes #36718

Samples

Check List

• [x] Read the Contributing Guide
• [ ] Updated Change Log
• [ ] Checked Tooling Support (#<Issue Number>)
• [x] Added necessary tests
  • [x] 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[bot]]

Codecov Report

Merging #37457 (7677577) into 2201.2.x (c743f3d) will increase coverage by 2.77%. The diff coverage is 85.33%.

@@              Coverage Diff               @@
##             2201.2.x   #37457      +/-   ##
==============================================
+ Coverage       71.97%   74.75%   +2.77%     
- Complexity      48336    50060    +1724     
==============================================
  Files            3334     3334              
  Lines          192888   192893       +5     
  Branches        25197    25199       +2     
==============================================
+ Hits           138838   144197    +5359     
+ Misses          46215    40374    -5841     
- Partials         7835     8322     +487     

Impacted Files	Coverage Δ
...llerinalang/compiler/semantics/analyzer/Types.java	77.10% <62.50%> (ø)
...ler/api/impl/symbols/BallerinaTableTypeSymbol.java	93.87% <81.25%> (ø)
...sions/ballerina/symbol/BallerinaSymbolService.java	58.79% <88.09%> (+4.62%)	:arrow_up:
...ballerina/compiler/api/impl/TypeParamResolver.java	70.44% <100.00%> (ø)
.../providers/context/ClassDefinitionNodeContext.java	80.00% <100.00%> (+0.38%)	:arrow_up:
...tions/providers/context/ModulePartNodeContext.java	80.00% <100.00%> (+0.37%)	:arrow_up:
.../java/io/ballerina/shell/service/ShellWrapper.java	88.60% <100.00%> (+0.29%)	:arrow_up:
...a/runtime/internal/scheduling/RuntimeRegistry.java	62.26% <0.00%> (-24.53%)	:arrow_down:
... and 224 more

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[mindula]

Decided not to show completions for the above scenario.