Improve the sorting order of completion items in from clause context

[TharushiJay]

Purpose

This PR improves the sorting order of completion items in from clause context giving priority to,

1. Iterables
2. Function call expressions
3. Default sorting to the rest of the completion items

Fixes #33861

Samples

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

Merging #34264 (2711d30) into master (99b3ae9) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master   #34264   +/-   ##
=========================================
  Coverage     74.09%   74.09%           
- Complexity    45942    45950    +8     
=========================================
  Files          3165     3165           
  Lines        179122   179144   +22     
  Branches      23080    23083    +3     
=========================================
+ Hits         132714   132738   +24     
  Misses        38603    38603           
+ Partials       7805     7803    -2     

Impacted Files	Coverage Δ
...tions/providers/context/FromClauseNodeContext.java	89.23% <100.00%> (+5.50%)	⬆️
.../ballerina/runtime/internal/scheduling/Strand.java	80.92% <0.00%> (-1.55%)	⬇️
...llerina/runtime/internal/scheduling/Scheduler.java	73.02% <0.00%> (-1.44%)	⬇️
...runtime/internal/scheduling/WorkerDataChannel.java	87.89% <0.00%> (-1.28%)	⬇️
...alang/langserver/diagnostic/DiagnosticsHelper.java	73.46% <0.00%> (-1.03%)	⬇️
...ballerinalang/central/client/CentralAPIClient.java	47.89% <0.00%> (+0.42%)	⬆️
...llerinalang/compiler/util/ImmutableTypeCloner.java	90.59% <0.00%> (+0.53%)	⬆️
...internal/repositories/RemotePackageRepository.java	71.50% <0.00%> (+1.55%)	⬆️
...s/src/main/java/io/ballerina/utils/ParserUtil.java	24.32% <0.00%> (+2.70%)	⬆️
...java/io/ballerina/runtime/internal/BLockStore.java	85.71% <0.00%> (+14.28%)	⬆️
... and 1 more

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[nadeeshaan]

LGTM