gradle: improve error message when using incorrect version of java

[ElijahLynn]

From a n00b perspective the current gradle messaging was confusing, I propose this change to make it more clear that we MUST make a change.

current:

Gradle runs with Java $currentJavaVersion. This project works best running with Java $expectedJavaVersion. 

proposed:

Gradle is running with $currentJavaVersion. This project requires Java $expectedJavaVersion. 
     From commandline: change JAVA_HOME and/or PATH to point at Java $expectedJavaVersion installation.
     From IntelliJ: change 'Gradle JVM' in 'Gradle Settings' to point at Java $expectedJavaVersion installation.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (539f059)	97548	63701	65.30%
Head commit (0bc7b68)	97548 (+0)	63703 (+2)	65.30% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#16827)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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_{Codacy stopped sending the deprecated coverage status on June 5th, 2024. Learn more}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.60%. Comparing base (539f059) to head (0bc7b68).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #16827   +/-   ##
==========================================
  Coverage      63.60%   63.60%           
- Complexity     20401    20404    +3     
==========================================
  Files           2537     2537           
  Lines          94783    94783           
  Branches        9907     9907           
==========================================
+ Hits           60285    60286    +1     
+ Misses         30892    30890    -2     
- Partials        3606     3607    +1     

see 6 files with indirect coverage changes

[mishomihov00]

LGTM