Acquire global read lock in presence of other exclusive resources

[marcphilipp]

Prior to this commit, the global read lock was not acquired for test
classes with @ResourceLock annotations causing @Isolated tests to
run in parallel.

Fixes #2605.

[codecov]

Codecov Report

Merging #2614 (83ea9a3) into main (05414dc) will increase coverage by 4.95%.
The diff coverage is 75.00%.

@@             Coverage Diff              @@
##               main    #2614      +/-   ##
============================================
+ Coverage     73.68%   78.63%   +4.95%     
- Complexity     3841     4083     +242     
============================================
  Files           424      424              
  Lines         11877    11878       +1     
  Branches        919      920       +1     
============================================
+ Hits           8751     9340     +589     
+ Misses         2799     2151     -648     
- Partials        327      387      +60     

Impacted Files	Coverage Δ	Complexity Δ
...rm/engine/support/hierarchical/NodeTreeWalker.java	83.72% <75.00%> (+26.57%)	20.00 <2.00> (+9.00)
...atform/commons/support/HierarchyTraversalMode.java	0.00% <0.00%> (-100.00%)	0.00% <0.00%> (-1.00%)
.../legacy/xml/LegacyXmlReportGeneratingListener.java	0.00% <0.00%> (-100.00%)	0.00% <0.00%> (-15.00%)
...platform/reporting/legacy/xml/XmlReportWriter.java	0.00% <0.00%> (-89.02%)	0.00% <0.00%> (-51.00%)
...it/platform/commons/support/ReflectionSupport.java	23.52% <0.00%> (-76.48%)	4.00% <0.00%> (-9.00%)
...t/platform/reporting/legacy/xml/XmlReportData.java	41.50% <0.00%> (-56.61%)	5.00% <0.00%> (-16.00%)
...junit/platform/engine/EngineExecutionListener.java	33.33% <0.00%> (-50.01%)	2.00% <0.00%> (-3.00%)
.../junit/platform/commons/util/ClasspathScanner.java	63.46% <0.00%> (-23.08%)	24.00% <0.00%> (-8.00%)
...java/org/junit/platform/testkit/engine/Events.java	78.26% <0.00%> (-18.48%)	33.00% <0.00%> (-8.00%)
...r/core/OutcomeDelayingEngineExecutionListener.java	63.33% <0.00%> (-16.67%)	8.00% <0.00%> (-2.00%)
... and 69 more

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