#3103 Fix error trying to load model with .onnx_data file (#84)

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## Issue
Closes #3103

## Change
The OnnxBertBiEncoder now accepts Paths directly (instead of only
InputStreams)


## General checklist
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[X] -->
- [x] There are no breaking changes
- [ ] I have added unit and/or integration tests for my change
- [ ] The tests cover both positive and negative cases
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[documentation](https://github.com/langchain4j/langchain4j/tree/main/docs/docs)
- [ ] I have added an example in the [examples
repo](https://github.com/langchain4j/langchain4j-examples) (only for
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Author: philippn

langchain4j-embeddings/src/main/java/dev/langchain4j/model/embedding/onnx/AbstractInProcessEmbeddingModel.java

@@ -7,7 +7,6 @@
 import dev.langchain4j.model.output.Response;
 import dev.langchain4j.model.output.TokenUsage;
 
-import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Path;
 import java.util.ArrayList;
@@ -16,7 +15,6 @@
 
 import static dev.langchain4j.internal.Utils.getOrDefault;
 import static dev.langchain4j.internal.ValidationUtils.ensureNotEmpty;
-import static java.nio.file.Files.newInputStream;
 import static java.util.Collections.singletonList;
 import static java.util.concurrent.CompletableFuture.supplyAsync;
 import static java.util.concurrent.TimeUnit.SECONDS;
@@ -48,19 +46,7 @@ protected static OnnxBertBiEncoder loadFromJar(String modelFileName, String toke
     }
 
     static OnnxBertBiEncoder loadFromFileSystem(Path pathToModel, Path pathToTokenizer, PoolingMode poolingMode) {
-        try {
-            return new OnnxBertBiEncoder(newInputStream(pathToModel), newInputStream(pathToTokenizer), poolingMode);
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    static OnnxBertBiEncoder loadFromFileSystem(Path pathToModel, InputStream tokenizer, PoolingMode poolingMode) {
-        try {
-            return new OnnxBertBiEncoder(newInputStream(pathToModel), tokenizer, poolingMode);
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
+        return new OnnxBertBiEncoder(pathToModel, pathToTokenizer, poolingMode);
     }
 
     protected abstract OnnxBertBiEncoder model();

langchain4j-embeddings/src/main/java/dev/langchain4j/model/embedding/onnx/OnnxBertBiEncoder.java

@@ -11,6 +11,7 @@
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.file.Path;
 import java.util.*;
 
 import static ai.onnxruntime.OnnxTensor.createTensor;
@@ -30,6 +31,18 @@ public class OnnxBertBiEncoder {
     private final HuggingFaceTokenizer tokenizer;
     private final PoolingMode poolingMode;
 
+    public OnnxBertBiEncoder(Path pathToModel, Path pathToTokenizer, PoolingMode poolingMode) {
+        try {
+            this.environment = OrtEnvironment.getEnvironment();
+            this.session = environment.createSession(pathToModel.toString());
+            this.expectedInputs = session.getInputNames();
+            this.tokenizer = HuggingFaceTokenizer.newInstance(pathToTokenizer, singletonMap("padding", "false"));
+            this.poolingMode = ensureNotNull(poolingMode, "poolingMode");
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
     public OnnxBertBiEncoder(InputStream model, InputStream tokenizer, PoolingMode poolingMode) {
         try {
             this.environment = OrtEnvironment.getEnvironment();