Merge PARL_IO and UART HIL into single binaries (#4303)

* Merge parl_io HIL into single binary

* Merge uart HIL into single binary

Author: JurajSadel

hil-test/Cargo.toml

@@ -97,14 +97,6 @@ harness = false
 name    = "parl_io"
 harness = false
 
-[[bin]]
-name    = "parl_io_tx"
-harness = false
-
-[[bin]]
-name    = "parl_io_tx_async"
-harness = false
-
 [[bin]]
 name    = "pcnt"
 harness = false
@@ -122,24 +114,6 @@ harness = false
 name    = "uart"
 harness = false
 
-[[bin]]
-name              = "uart_async"
-harness           = false
-required-features = ["embassy"]
-
-[[bin]]
-name              = "uart_uhci"
-harness           = false
-required-features = ["embassy"]
-
-[[bin]]
-name    = "uart_regression"
-harness = false
-
-[[bin]]
-name    = "uart_tx_rx_async"
-harness = false
-
 [[bin]]
 name              = "embassy_timers_executors"
 harness           = false