CI: Update to actions/cache@v3, increase cache limit to 10 GiB

And force rebuild of Linux cache which got corrupted...

.github/workflows/android_builds.yml

@@ -3,6 +3,7 @@ on: [push, pull_request]
 
 # Global Settings
 env:
+  # Only used for the cache key. Increment version to force clean build.
   GODOT_BASE_BRANCH: master
   SCONSFLAGS: verbose=yes warnings=extra werror=yes debug_symbols=no module_text_server_fb_enabled=yes
 

.github/workflows/ios_builds.yml

@@ -3,6 +3,7 @@ on: [push, pull_request]
 
 # Global Settings
 env:
+  # Only used for the cache key. Increment version to force clean build.
   GODOT_BASE_BRANCH: master
   SCONSFLAGS: verbose=yes warnings=extra werror=yes debug_symbols=no module_text_server_fb_enabled=yes
 

.github/workflows/javascript_builds.yml

@@ -3,6 +3,7 @@ on: [push, pull_request]
 
 # Global Settings
 env:
+  # Only used for the cache key. Increment version to force clean build.
   GODOT_BASE_BRANCH: master
   SCONSFLAGS: verbose=yes warnings=extra werror=yes debug_symbols=no
   EM_VERSION: 2.0.27

.github/workflows/linux_builds.yml

@@ -3,7 +3,8 @@ on: [push, pull_request]
 
 # Global Settings
 env:
-  GODOT_BASE_BRANCH: master
+  # Only used for the cache key. Increment version to force clean build.
+  GODOT_BASE_BRANCH: master-v2
   SCONSFLAGS: verbose=yes warnings=extra werror=yes module_text_server_fb_enabled=yes
 
 concurrency:
@@ -36,6 +37,8 @@ jobs:
             tests: true
             sconsflags: float=64 use_asan=yes use_ubsan=yes
             proj-test: true
+            # Can be turned off for PRs that intentionally break compat with godot-cpp,
+            # until both the upstream PR and the matching godot-cpp changes are merged.
             godot-cpp-test: true
             bin: "./bin/godot.linuxbsd.double.tools.64.san"
             build-mono: false

.github/workflows/windows_builds.yml

@@ -4,6 +4,7 @@ on: [push, pull_request]
 # Global Settings
 # SCONS_CACHE for windows must be set in the build environment
 env:
+  # Only used for the cache key. Increment version to force clean build.
   GODOT_BASE_BRANCH: master
   SCONSFLAGS: verbose=yes warnings=all werror=yes module_text_server_fb_enabled=yes
   SCONS_CACHE_MSVC_CONFIG: true
@@ -56,7 +57,6 @@ jobs:
           target: ${{ matrix.target }}
           tools: ${{ matrix.tools }}
           tests: ${{ matrix.tests }}
-          scons-cache-limit: 3072
 
       # Execute unit tests for the editor
       - name: Unit tests