Use path of configuration or executable to pin result cache in place

[epdenouden]

Implements a nicer way of result cache file placement.

Fixes #3587

[codecov]

Codecov Report

Merging #3624 into 7.5 will decrease coverage by 0.03%.
The diff coverage is 50%.

@@             Coverage Diff              @@
##                7.5    #3624      +/-   ##
============================================
- Coverage     83.49%   83.46%   -0.04%     
- Complexity     3638     3641       +3     
============================================
  Files           143      143              
  Lines          9684     9689       +5     
============================================
+ Hits           8086     8087       +1     
- Misses         1598     1602       +4

Impacted Files	Coverage Δ	Complexity Δ
src/TextUI/TestRunner.php	67.85% <33.33%> (-0.32%)	294 <0> (+1)
src/Util/TestResultCache.php	89.47% <75%> (-1.44%)	28 <3> (+2)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ea74787...2e2ee01. Read the comment docs.