GLES: Free textures on device lost, and unsubmitted step data at exit

- The texture and fragment test caches dropped their GLRTexture objects on
  DeviceLost without queueing them for deletion, leaking them on every
  Android background/resume. The deleter already skips the GL calls when
  the context is gone.
- GLRenderManager::ThreadEnd cleared unsubmitted init and render steps
  without freeing the data they own. Run them through the dry run instead,
  which now also frees stereo matrices and shader code.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

GPU/GLES/FragmentTestCacheGLES.cpp

@@ -144,7 +144,7 @@ GLRTexture *FragmentTestCacheGLES::CreateTestTexture(const GEComparison funcs[4]
 }
 
 void FragmentTestCacheGLES::Clear(bool deleteThem) {
-	if (deleteThem) {
+	if (deleteThem && render_) {
 		for (const auto &[_, v] : cache_) {
 			render_->DeleteTexture(v.texture);
 		}

GPU/GLES/FragmentTestCacheGLES.h

@@ -68,7 +68,8 @@ public:
 	void BindTestTexture(int slot);
 
 	void DeviceLost() {
-		Clear(false);
+		// Queue the deletes anyway, the deleter frees the GLRTexture objects and skips the GL calls if needed.
+		Clear(true);
 		render_ = nullptr;
 	}
 	void DeviceRestore(Draw::DrawContext *draw);

GPU/GLES/TextureCacheGLES.cpp

@@ -51,10 +51,10 @@ void TextureCacheGLES::SetFramebufferManager(FramebufferManagerGLES *fbManager)
 }
 
 void TextureCacheGLES::ReleaseTexture(TexCacheEntry *entry, bool delete_them) {
-	if (delete_them) {
-		if (entry->textureName) {
-			render_->DeleteTexture(entry->textureName);
-		}
+	// Delete even when !delete_them (device lost): the GLRTexture is a heap object that only the deleter
+	// frees, and the deleter skips the GL calls itself once the context is gone.
+	if (entry->textureName && render_) {
+		render_->DeleteTexture(entry->textureName);
 	}
 	entry->textureName = nullptr;
 }