Testscripts for EMV-Testsuite: Added/customized scripts for the platforms Santaro,Satoka,Santino,Satino-LT, refs #29020

* Santaro
** Modified umount command in preparations: now no more errors occur when USB-Sticks/SD-Cards are mounted with different partitions
** Modified sleep command: time changed from 1 to 0.9 seconds, now it is consistent with the real-time measurement
* Santoka
** Commented out WiFi and Bluetooth commands: these are not tested by default
** Modified sleep command: same reason as above
* Santino
** Added EMV-Testscript: necessary to run the EMV-Testsuite
* Santion-LT
** Added EMV-Testscript: necessary to run the EMV-Testsuite

* Use adapted canecho

* Add simple can echo server script

* Updated scripts with versions received from Stefan Schrader.

* Moved test tools from recipes-guf to recipes-test
* Removed ac97regtest and pman completely, because they are not relevant for our current platforms anymore
* Corrected some summary entries in bitbake recipes