Move Malformed URL catching to core

[bitwiseman]

Description

This MalformedURLException is always caught and re-thrown as GHException.
Converting that to be the standard behavior.

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[codecov]

Codecov Report

Merging #1241 (58099fc) into main (c0d8059) will increase coverage by 0.32%.
The diff coverage is 87.50%.

@@             Coverage Diff              @@
##               main    #1241      +/-   ##
============================================
+ Coverage     76.96%   77.28%   +0.32%     
- Complexity     1888     1889       +1     
============================================
  Files           188      188              
  Lines          5968     5943      -25     
  Branches        328      328              
============================================
  Hits           4593     4593              
+ Misses         1176     1152      -24     
+ Partials        199      198       -1     

Impacted Files	Coverage Δ
src/main/java/org/kohsuke/github/GHPerson.java	66.66% <0.00%> (+3.03%)	⬆️
src/main/java/org/kohsuke/github/GHCompare.java	91.93% <80.00%> (+2.87%)	⬆️
...ain/java/org/kohsuke/github/GHAppInstallation.java	91.89% <100.00%> (+4.39%)	⬆️
...org/kohsuke/github/GHAppInstallationsIterable.java	100.00% <100.00%> (+14.28%)	⬆️
...n/java/org/kohsuke/github/GHArtifactsIterable.java	91.66% <100.00%> (+11.66%)	⬆️
.../main/java/org/kohsuke/github/GHSearchBuilder.java	100.00% <100.00%> (+16.66%)	⬆️
.../org/kohsuke/github/GHWorkflowJobQueryBuilder.java	100.00% <100.00%> (+18.18%)	⬆️
...ava/org/kohsuke/github/GHWorkflowRunsIterable.java	100.00% <100.00%> (+13.33%)	⬆️
...n/java/org/kohsuke/github/GHWorkflowsIterable.java	93.33% <100.00%> (+10.00%)	⬆️
...in/java/org/kohsuke/github/GitHubPageIterator.java	83.67% <100.00%> (+3.28%)	⬆️
... and 2 more

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