Revert semtype changes

[chiranSachintha]

Purpose

$title.

Fixes #

Approach

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

Samples

Provide high-level details about the samples related to this feature.

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 84.24779% with 89 lines in your changes missing coverage. Please review.

Project coverage is 77.40%. Comparing base (e01fe53) to head (8996d17).
Report is 14 commits behind head on 2201.11.0-stage.

Files with missing lines	Patch %	Lines
.../ballerinalang/compiler/BIRPackageSymbolEnter.java	76.40%	15 Missing and 6 partials ⚠️
...a/io/ballerina/runtime/internal/TypeConverter.java	31.57%	11 Missing and 2 partials ⚠️
...2/ballerinalang/compiler/bir/emit/TypeEmitter.java	52.63%	8 Missing and 1 partial ⚠️
...allerina/runtime/internal/types/BFunctionType.java	50.00%	2 Missing and 4 partials ⚠️
.../io/ballerina/runtime/internal/types/BAnyType.java	76.47%	4 Missing ⚠️
...ler/api/impl/symbols/BallerinaUnionTypeSymbol.java	77.77%	1 Missing and 3 partials ⚠️
...ballerinalang/compiler/bir/codegen/JvmCastGen.java	57.14%	2 Missing and 1 partial ⚠️
...io/ballerina/runtime/internal/types/BByteType.java	60.00%	2 Missing ⚠️
.../ballerina/runtime/internal/types/BHandleType.java	60.00%	2 Missing ⚠️
...allerina/runtime/internal/types/BReadonlyType.java	66.66%	2 Missing ⚠️
... and 20 more

Additional details and impacted files

@@                  Coverage Diff                  @@
##             2201.11.0-stage   #43742      +/-   ##
=====================================================
+ Coverage              77.22%   77.40%   +0.17%     
+ Complexity             58799    58608     -191     
=====================================================
  Files                   3527     3446      -81     
  Lines                 221752   219182    -2570     
  Branches               28815    28972     +157     
=====================================================
- Hits                  171250   169647    -1603     
+ Misses                 40841    40104     -737     
+ Partials                9661     9431     -230     

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