Rework CI workflows (#8688)

- split workflows into separate files to trigger by path
  this should help out documentation and boards / eboot / pkg files
  updates, since those *wont* trigger usual build stuff anymore
- build*.sh whatever merged into just common.sh and build.sh
  trigger different parity builds, mod % rem and allow to set .ino list
  through the environment variable
- removes unnecessary temporary files, try to use more pipes
  move remaining ones into cache dir instead of PWD
- remove legacy TRAVIS env vars, use ESP8266_ARDUINO prefix for config
- remove Windows path workarounds
- hardware/ and ide/ directories are set through envionment
  do not force specific paths, simplify builds on local machine
- sketch list is set through environment. expicit paths for Windows and
  macOS builders. platformio also gets a real shuffled list instead of
  mod and rem magic numbers
- detect root of the repo through git cli, not base{name,dir} or relative paths

tests/run_CI_locally.sh

@@ -82,34 +82,41 @@ done
 git submodule update --init
 
 export HOME="${TMPCI}"
-export TRAVIS_BUILD_DIR="${TMPCI}"
+export ESP8266_ARDUINO_BUILD_DIR="${TMPCI}"
 export BUILD_TYPE="$BUILD_TYPE"
 
 if [ "$BUILD_TYPE" = "build" ]; then
     tests/build.sh
+
 elif [ "$BUILD_TYPE" = "build_even" ]; then
-    BUILD_PARITY=even tests/build.sh
+    tests/build.sh even
+
 elif [ "$BUILD_TYPE" = "build_odd" ]; then
-    BUILD_PARITY=odd tests/build.sh
+    tests/build.sh odd
 
 elif [ "$BUILD_TYPE" = "debug_even" ]; then
-    BUILD_PARITY=even tests/debug.sh
+    env ESP8266_ARDUINO_DEBUG=debug tests/build.sh even
+
 elif [ "$BUILD_TYPE" = "debug_odd" ]; then
-    BUILD_PARITY=odd tests/debug.sh
+    env ESP8266_ARDUINO_DEBUG=debug tests/build.sh odd
 
 elif [ "$BUILD_TYPE" = "build6" ]; then
-    tests/build6.sh
+    env ESP8266_ARDUINO_LWIP=lm6f tests/build.sh
+
 elif [ "$BUILD_TYPE" = "build6_even" ]; then
-    BUILD_PARITY=even tests/build6.sh
+    env ESP8266_ARDUINO_LWIP=lm6f tests/build.sh even
+
 elif [ "$BUILD_TYPE" = "build6_odd" ]; then
-    BUILD_PARITY=odd tests/build6.sh
+    env ESP8266_ARDUINO_LWIP=lm6f tests/build.sh odd
 
 elif [ "$BUILD_TYPE" = "platformio" ]; then
-    tests/platformio.sh
+    env ESP8266_ARDUINO_BUILDER=platformio tests/build.sh
+
 elif [ "$BUILD_TYPE" = "platformio_even" ]; then
-    BUILD_PARITY=even tests/platformio.sh
+    env ESP8266_ARDUINO_BUILDER=platformio tests/build.sh even
+
 elif [ "$BUILD_TYPE" = "platformio_odd" ]; then
-    BUILD_PARITY=odd tests/platformio.sh
+    env ESP8266_ARDUINO_BUILDER=platformio tests/build.sh odd
 
 elif [ "$BUILD_TYPE" = host ]; then
     tests/ci/host_test.sh