Add ability to combine onlyMethods and addMethod

[bikalbasnet]

Related Issue: #3858
Reverts some codes that was added in this #3687

This PR gives the ability to combine two new methods together - onlyMethods and addMethods
so we can write UTs like this

$this->getMockBuilder(SomeClass::class)
    ->onlyMethods(['aMethodThatExists'])
    ->addMethods(['aMethodThatDoesNotExist']);

[codecov]

Codecov Report

Merging #3907 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #3907      +/-   ##
============================================
+ Coverage     83.67%   83.68%   +0.01%     
+ Complexity     3855     3854       -1     
============================================
  Files           151      151              
  Lines         10201    10196       -5     
============================================
- Hits           8536     8533       -3     
+ Misses         1665     1663       -2

Impacted Files	Coverage Δ	Complexity Δ
src/Framework/MockObject/MockBuilder.php	61.11% <100%> (-2.76%)	36 <3> (ø)
src/Framework/MockObject/Generator.php	83.93% <100%> (ø)	145 <10> (ø)	⬇️
src/Util/Printer.php	50% <0%> (ø)	20% <0%> (ø)	⬇️
src/Framework/TestCase.php	81% <0%> (+0.17%)	336% <0%> (-2%)	⬇️
src/Util/Filter.php	97.87% <0%> (+2.75%)	22% <0%> (+1%)	⬆️

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[sebastianbergmann]

Superseded by #3911.