[FEATURE] Enable functional tests to be executed by non CLI SAPI
[FEATURE] Enable functional tests to be executed by non CLI SAPI

The FunctionalTestRequestHandler should be executable by non CLI requests to
enable TestRunners like VisualPHPUnit.

Change-Id: Id7b6d2f35f3bd9d317dbd0e0f11b314d070ae506
Fixes: #40273
Releases: 1.2
Original-Commit-Hash: 8d01cdf42987f9d1104f93ca785a69a69eebbd7e

albe/flow-development-collection,bwaidelich/flow-development-collection,kdambekalns/flow-development-collection,robertlemke/flow-development-collection,robertlemke/flow-development-collection,daniellienert/flow-development-collection,kitsunet/flow-development-collection,mkeitsch/flow-development-collection,mkeitsch/flow-development-collection,kdambekalns/flow-development-collection,chewbakartik/flow-development-collection,bwaidelich/flow-development-collection,kitsunet/flow-development-collection,neos/flow-development-collection,bwaidelich/flow-development-collection,neos/flow-development-collection,fcool/flow-development-collection,fcool/flow-development-collection,aertmann/flow-development-collection,fcool/flow-development-collection,robertlemke/flow-development-collection,albe/flow-development-collection,gerhard-boden/flow-development-collection,mkeitsch/flow-development-collection,dlubitz/flow-development-collection,kdambekalns/flow-development-collection,dlubitz/flow-development-collection,daniellienert/flow-development-collection,dfeyer/flow-development-collection,gerhard-boden/flow-development-collection,chewbakartik/flow-development-collection,robertlemke/flow-development-collection,gerhard-boden/flow-development-collection,aertmann/flow-development-collection,kitsunet/flow-development-collection,dfeyer/flow-development-collection,albe/flow-development-collection,chewbakartik/flow-development-collection,dlubitz/flow-development-collection,kdambekalns/flow-development-collection,neos/flow-development-collection,dfeyer/flow-development-collection,aertmann/flow-development-collection,daniellienert/flow-development-collection,dfeyer/flow-development-collection,neos/flow-development-collection,fcool/flow-development-collection