fix(windows): get gradle path with which command

[erisu]

Motivation and Context

Resolves #1792

Description

Before Android Studio 3.5, Gradle was bundled with the IDE.

In the past, for Windows environments, we attempted to locate the Android Studio installation path to use its bundled Gradle executable.

However, Cordova has not supported old versions of Android Studio for a long time, making this logic obsolete. Additionally, past release announcements have indicated increasing Android Studio requirements:

• Cordova-Android 13 required a minimum of Android Studio Jellyfish.
• Cordova-Android 14 required a minimum of Android Studio Ladybug.

Documentation also stated that since Cordova-Android 6.4.0, a system-level Gradle installation is required. Cordova would then uses this to generate the project-level Gradle wrapper.

Given these changes, this PR will remove the outdated Windows-specific logic. The .bat file will remain for now but will be removed in the next major release.

Testing

• Create cordova project in a directory with spaces
• Added cordova platform which contains this PR changes.
• Built app with cordova build android command on Windows.

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 72.58%. Comparing base (1d82a3b) to head (e514478).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/check_reqs.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1793      +/-   ##
==========================================
+ Coverage   71.89%   72.58%   +0.68%     
==========================================
  Files          23       23              
  Lines        1854     1835      -19     
==========================================
- Hits         1333     1332       -1     
+ Misses        521      503      -18     

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