Improve error message when colocated join is requested but workermanager is disabled

[gortiz]

Simple change to include the property that needs to be changed

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 63.68%. Comparing base (59551e4) to head (4e7a58f).
Report is 1693 commits behind head on master.

Files with missing lines	Patch %	Lines
.../java/org/apache/pinot/query/QueryEnvironment.java	0.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #14947      +/-   ##
============================================
+ Coverage     61.75%   63.68%   +1.92%     
- Complexity      207     1482    +1275     
============================================
  Files          2436     2727     +291     
  Lines        133233   152457   +19224     
  Branches      20636    23565    +2929     
============================================
+ Hits          82274    97086   +14812     
- Misses        44911    48057    +3146     
- Partials       6048     7314    +1266     

Flag	Coverage Δ
custom-integration1	100.00% <ø> (+99.99%)	⬆️
integration	100.00% <ø> (+99.99%)	⬆️
integration1	100.00% <ø> (+99.99%)	⬆️
integration2	0.00% <ø> (ø)
java-11	63.65% <0.00%> (+1.94%)	⬆️
java-21	63.55% <0.00%> (+1.92%)	⬆️
skip-bytebuffers-false	63.66% <0.00%> (+1.91%)	⬆️
skip-bytebuffers-true	63.55% <0.00%> (+35.82%)	⬆️
temurin	63.68% <0.00%> (+1.92%)	⬆️
unittests	63.67% <0.00%> (+1.92%)	⬆️
unittests1	56.22% <0.00%> (+9.33%)	⬆️
unittests2	34.00% <0.00%> (+6.27%)	⬆️

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