drivers: adc: Adding Infineon HPPASS ADC tests Adding files to allow running the following tests for the Infineon HPPASS SAR ADC driver on the PSOC C3 family of MCUs: * tests/drivers/adc/adc_api * tests/drivers/adc/adc_error_case Modifies the adc_error_cases test to use add a KConfig option for the valid resolution. Signed-off-by: John Batch <john.batch@infineon.com>