Fix issues regarding finites type with byte values

[SasinduDilshara]

This PR is due to the failures in https://github.com/ballerina-platform/ballerina-lang/actions/runs/12150965444/job/33884989518?pr=43606.

With the new semtype changes, few behaviours are changed in finite types.

Consider a Singleton type like following

type FiniteType true|"A"|1|2;

Before semtype, this value 1(inside the finite type) is treated as a Long, after semtype it is treated as a Integer in runtime.
So the output of the TypeUtils.getType is different in the twocases.
Thats the reason for the test failures

[codecov]

Codecov Report

Attention: Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.

Project coverage is 85.31%. Comparing base (14aff6e) to head (478a9e2).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
...java/io/ballerina/lib/data/xmldata/FromString.java	72.72%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #63      +/-   ##
============================================
- Coverage     86.01%   85.31%   -0.70%     
- Complexity      792      906     +114     
============================================
  Files            25       31       +6     
  Lines          3381     3752     +371     
  Branches        672      756      +84     
============================================
+ Hits           2908     3201     +293     
- Misses          295      332      +37     
- Partials        178      219      +41     

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