🔨 Rename FYSETC S6/Spider Environments

[thisiskeithb]

Description

This is a precursor PR in preparation for additional Spider board support. Figured I'd break out these changes since there was already a lot going on.

• Rename/generalize FYSETC S6/Spider environments.
• Dropped STM32F446VE_fysetc environment from the Spider V2.2 since all Spider boards manufactured after 2021/06/23 (V2.2+) use the smaller 32k bootloader.
• S6 and Spider boards ship with an STM32F446VET6 MCU, so I corrected the variant info.
• Rename FYSETC S6 test & moved over the generic S6 board config to make the test standalone in preparation for config removal. We don't maintain generic board configs / they need to be customized for a specific machine and this config is extremely basic:

S6 config diffed on top of default config:

diff --git a/config/examples/FYSETC/S6/Configuration.h b/config/examples/FYSETC/S6/Configuration.h
index ea14b9d..cca8f52 100644
--- a/config/examples/FYSETC/S6/Configuration.h
+++ b/config/examples/FYSETC/S6/Configuration.h
@@ -21,6 +21,8 @@
  */
 #pragma once
 
+#define CONFIG_EXAMPLES_DIR "FYSETC/S6"
+
 /**
  * Configuration.h
  *
@@ -68,7 +70,7 @@
 
 // Choose the name from boards.h that matches your setup
 #ifndef MOTHERBOARD
-  #define MOTHERBOARD BOARD_RAMPS_14_EFB
+  #define MOTHERBOARD BOARD_FYSETC_S6
 #endif
 
 /**
@@ -79,7 +81,7 @@
  *
  * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
-#define SERIAL_PORT 0
+#define SERIAL_PORT -1
 
 /**
  * Serial Port Baud Rate
@@ -92,7 +94,7 @@
  *
  * :[2400, 9600, 19200, 38400, 57600, 115200, 250000, 500000, 1000000]
  */
-#define BAUDRATE 250000
+#define BAUDRATE 115200
 
 //#define BAUD_RATE_GCODE     // Enable G-code M575 to set the baud rate
 
@@ -570,7 +572,7 @@
 #define TEMP_SENSOR_5 0
 #define TEMP_SENSOR_6 0
 #define TEMP_SENSOR_7 0
-#define TEMP_SENSOR_BED 1
+#define TEMP_SENSOR_BED 0
 #define TEMP_SENSOR_PROBE 0
 #define TEMP_SENSOR_CHAMBER 0
 #define TEMP_SENSOR_COOLER 0
@@ -1245,7 +1247,7 @@
  * Override with M92 (when enabled below)
  *                                      X, Y, Z [, I [, J [, K...]]], E0 [, E1[, E2...]]
  */
-#define DEFAULT_AXIS_STEPS_PER_UNIT   { 80, 80, 400, 500 }
+#define DEFAULT_AXIS_STEPS_PER_UNIT   { 80, 80, 400, 400 }
 
 /**
  * Enable support for M92. Disable to save at least ~530 bytes of flash.
@@ -2379,7 +2381,7 @@
  *   M501 - Read settings from EEPROM. (i.e., Throw away unsaved changes)
  *   M502 - Revert settings to "factory" defaults. (Follow with M500 to init the EEPROM.)
  */
-//#define EEPROM_SETTINGS     // Persistent storage with M500 and M501
+#define EEPROM_SETTINGS       // Persistent storage with M500 and M501
 //#define DISABLE_M503        // Saves ~2700 bytes of flash. Disable for release!
 #define EEPROM_CHITCHAT       // Give feedback on EEPROM commands. Disable to save flash.
 #define EEPROM_BOOT_SILENT    // Keep M503 quiet and only give errors during first load
@@ -2669,7 +2671,7 @@
  * SD Card support is disabled by default. If your controller has an SD slot,
  * you must uncomment the following option or it won't work.
  */
-//#define SDSUPPORT
+#define SDSUPPORT
 
 /**
  * SD CARD: ENABLE CRC
diff --git a/config/examples/FYSETC/S6/Configuration_adv.h b/config/examples/FYSETC/S6/Configuration_adv.h
index 68646ba..357aca0 100644
--- a/config/examples/FYSETC/S6/Configuration_adv.h
+++ b/config/examples/FYSETC/S6/Configuration_adv.h
@@ -21,6 +21,8 @@
  */
 #pragma once
 
+#define CONFIG_EXAMPLES_DIR "FYSETC/S6"
+
 /**
  * Configuration_adv.h
  *
@@ -1071,7 +1073,7 @@
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE              5    // (%) Maximum incline that G34 will handle
-  #define Z_STEPPER_ALIGN_ITERATIONS 5    // Number of iterations to apply during alignment
+  #define Z_STEPPER_ALIGN_ITERATIONS 3    // Number of iterations to apply during alignment
   #define Z_STEPPER_ALIGN_ACC        0.02 // Stop iterating early if the accuracy is better than this
   #define RESTORE_LEVELING_AFTER_G34      // Restore leveling after G34 is done?
   // After G34, re-home Z (G28 Z) or just calculate it from the last probe heights?

Note: Z_STEPPER_ALIGN_ITERATIONS was not included in standalone test due to Z_STEPPER_AUTO_ALIGN being disabled in the config.

---

Smaller Bootloader Info & Sources:

• https://github.com/FYSETC/FYSETC-S6/tree/main/bootloader
• https://github.com/FYSETC/FYSETC-SPIDER/tree/main/bootloader

[thisiskeithb]

MEATPACK_ON_SERIAL_PORT_1 is about the only useful part of this test, so it can likely be merged into another test & then this test can be completely removed to speed up CI checks.