RUM-11320: Fix Gradle 9.0 support

[0xnm]

What does this PR do?

A bug squeezed in b95e0d7, breaking a proper Gradle version check.

As a result, with Gradle 9.0 the method to mark tasks as not compatible with configuration cache wasn't executed, because 9.0 >= 8.4 was returning false.

This PR does a proper bugfix.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.39%. Comparing base (35ea57c) to head (a59d190).

Files with missing lines	Patch %	Lines
...atadog/gradle/plugin/internal/CurrentAgpVersion.kt	50.00%	2 Missing ⚠️
...com/datadog/gradle/plugin/DdAndroidGradlePlugin.kt	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop     #435      +/-   ##
=============================================
+ Coverage      75.78%   76.39%   +0.61%     
- Complexity       278      286       +8     
=============================================
  Files             35       35              
  Lines           1057     1063       +6     
  Branches         129      130       +1     
=============================================
+ Hits             801      812      +11     
+ Misses           195      194       -1     
+ Partials          61       57       -4     

Files with missing lines	Coverage Δ
...main/kotlin/com/datadog/gradle/plugin/TaskUtils.kt	89.29% <100.00%> (+12.01%)	⬆️
...com/datadog/gradle/plugin/DdAndroidGradlePlugin.kt	59.09% <0.00%> (ø)
...atadog/gradle/plugin/internal/CurrentAgpVersion.kt	50.00% <50.00%> (ø)

... and 2 files with indirect coverage changes

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