Fix LiquidCrystal CI failures (#20873)

Fix incorrect dependency syntax for LPC.
Disambiguate LiquidCrystal library names.

platformio.ini

 NEOPIXEL_LED            = Adafruit NeoPixel@1.5.0
                           src_filter=+<src/feature/leds/neopixel.cpp>
 MAX6675_._IS_MAX31865   = Adafruit MAX31865 library@~1.1.0
-USES_LIQUIDCRYSTAL      = LiquidCrystal@1.5.0
+USES_LIQUIDCRYSTAL      = bitbucket-fmalpartida/LiquidCrystal@1.5.0
 USES_LIQUIDCRYSTAL_I2C  = marcoschwartz/LiquidCrystal_I2C@1.1.4
 USES_LIQUIDTWI2         = LiquidTWI2@1.2.7
 HAS_WIRED_LCD           = src_filter=+<src/lcd/lcdprint.cpp>
 src_filter        = ${common.default_src_filter} +<src/HAL/LPC1768> +<src/HAL/shared/backtrace>
 lib_deps          = ${common.lib_deps}
   Servo
-custom_marlin.USES_LIQUIDCRYSTAL = LiquidCrystal~1.0.7
+custom_marlin.USES_LIQUIDCRYSTAL = arduino-libraries/LiquidCrystal@~1.0.7
 custom_marlin.NEOPIXEL_LED = Adafruit NeoPixel=https://github.com/p3p/Adafruit_NeoPixel/archive/1.5.0.zip
 build_flags       = ${common.build_flags} -DU8G_HAL_LINKS -IMarlin/src/HAL/LPC1768/include -IMarlin/src/HAL/LPC1768/u8g
   # debug options for backtrace