github/workflows/ports_psoc6.yml: Limit self-hosted to project HIL.

[jaenrig-ifx]

Prevent using general organization runners.

[github-actions]

Code size report:

Reference:  lib/mtb-psoc6-libs: Update MTB PSOC6 libs. [f631c93]
Comparison: github/workflows/ports_psoc6.yml: Limit self-hosted to project HIL. [merge of a65e325]
  mpy-cross:    +0 +0.000% 
   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
      esp32:    +0 +0.000% ESP32_GENERIC
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO_W
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS
  qemu rv32:    +0 +0.000% VIRT_RV32