fix various issues for esp32 (#3007)

* kconfig: Fix invalid dependancy in fsdrv

LV_USE_FS_* symbols are integers, instead of usual booleans.
We must treat them as such.

* ci: Get LVGL version from git tag

* docu: Update Espressif readme

* ci run apt update before installing

.github/workflows/esp_upload_component.yml

@@ -1,19 +1,23 @@
 name: Push LVGL release to Espressif Component Service
 
-# Upload on successful release
+# If the commit is tagged, it will be uploaded. Other scenario silently fail.
 on:
-  release:
-    types:
-      - released
+  push:
+    branches:
+      - master
 
 jobs:
   upload_components:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
-      - name: Upload component to component service
+        with:
+          submodules: "recursive"
+
+      - name: Upload component to component registry
         uses: espressif/github-actions/upload_components@master
         with:
           name: "lvgl"
+          version: "git"
           namespace: "lvgl"
           api_token: ${{ secrets.ESP_IDF_COMPONENT_API_TOKEN }}