Update genai contract tests (aws-observability#976)

*Description of changes:*
Small changes in our contract test assertions to align with recent Gen
AI changes in upstream patch.

Relevant changes from upstream patch:
- mxiamxia/opentelemetry-java-instrumentation#26
- mxiamxia/opentelemetry-java-instrumentation#27

*Test plan:*
Ran the updated contract tests.
![Screenshot 2024-12-17 at 9 30
15 AM](https://github.com/user-attachments/assets/c6ed9194-a653-435d-ba07-b7055dd79aae)

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Author: yiyuan-he

appsignals-tests/contract-tests/src/test/java/software/amazon/opentelemetry/appsignals/test/awssdk/base/AwsSdkBaseTest.java

@@ -1996,6 +1996,7 @@ protected void doTestBedrockRuntimeAi21Jamba() {
         List.of(
             assertAttribute(
                 SemanticConventionsConstants.GEN_AI_REQUEST_MODEL, "ai21.jamba-1-5-mini-v1:0"),
+            assertAttribute(SemanticConventionsConstants.GEN_AI_SYSTEM, "aws.bedrock"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TEMPERATURE, "0.7"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TOP_P, "0.8"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_RESPONSE_FINISH_REASONS, "[stop]"),
@@ -2070,6 +2071,7 @@ protected void doTestBedrockRuntimeAmazonTitan() {
             assertAttribute(
                 SemanticConventionsConstants.GEN_AI_REQUEST_MODEL,
                 "amazon.titan-text-premier-v1:0"),
+            assertAttribute(SemanticConventionsConstants.GEN_AI_SYSTEM, "aws.bedrock"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_MAX_TOKENS, "100"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TEMPERATURE, "0.7"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TOP_P, "0.9"),
@@ -2148,6 +2150,7 @@ protected void doTestBedrockRuntimeAnthropicClaude() {
             assertAttribute(
                 SemanticConventionsConstants.GEN_AI_REQUEST_MODEL,
                 "anthropic.claude-3-haiku-20240307-v1:0"),
+            assertAttribute(SemanticConventionsConstants.GEN_AI_SYSTEM, "aws.bedrock"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_MAX_TOKENS, "512"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TEMPERATURE, "0.6"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TOP_P, "0.53"),
@@ -2225,6 +2228,7 @@ protected void doTestBedrockRuntimeCohereCommandR() {
         List.of(
             assertAttribute(
                 SemanticConventionsConstants.GEN_AI_REQUEST_MODEL, "cohere.command-r-v1:0"),
+            assertAttribute(SemanticConventionsConstants.GEN_AI_SYSTEM, "aws.bedrock"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_MAX_TOKENS, "4096"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TEMPERATURE, "0.8"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TOP_P, "0.45"),
@@ -2302,6 +2306,7 @@ protected void doTestBedrockRuntimeMetaLlama() {
         List.of(
             assertAttribute(
                 SemanticConventionsConstants.GEN_AI_REQUEST_MODEL, "meta.llama3-70b-instruct-v1:0"),
+            assertAttribute(SemanticConventionsConstants.GEN_AI_SYSTEM, "aws.bedrock"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_MAX_TOKENS, "128"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TEMPERATURE, "0.1"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TOP_P, "0.9"),
@@ -2379,11 +2384,12 @@ protected void doTestBedrockRuntimeMistral() {
             assertAttribute(
                 SemanticConventionsConstants.GEN_AI_REQUEST_MODEL,
                 "mistral.mistral-large-2402-v1:0"),
+            assertAttribute(SemanticConventionsConstants.GEN_AI_SYSTEM, "aws.bedrock"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_MAX_TOKENS, "4096"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TEMPERATURE, "0.75"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_REQUEST_TOP_P, "0.25"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_RESPONSE_FINISH_REASONS, "[stop]"),
-            assertAttribute(SemanticConventionsConstants.GEN_AI_USAGE_INPUT_TOKENS, "15"),
+            assertAttribute(SemanticConventionsConstants.GEN_AI_USAGE_INPUT_TOKENS, "16"),
             assertAttribute(SemanticConventionsConstants.GEN_AI_USAGE_OUTPUT_TOKENS, "24")));
     assertMetricClientAttributes(
         metrics,

appsignals-tests/contract-tests/src/test/java/software/amazon/opentelemetry/appsignals/test/utils/SemanticConventionsConstants.java

@@ -63,6 +63,7 @@ public class SemanticConventionsConstants {
   public static final String AWS_GUARDRAIL_ID = "aws.bedrock.guardrail.id";
   public static final String AWS_GUARDRAIL_ARN = "aws.bedrock.guardrail.arn";
   public static final String GEN_AI_REQUEST_MODEL = "gen_ai.request.model";
+  public static final String GEN_AI_SYSTEM = "gen_ai.system";
   public static final String GEN_AI_REQUEST_MAX_TOKENS = "gen_ai.request.max_tokens";
   public static final String GEN_AI_REQUEST_TEMPERATURE = "gen_ai.request.temperature";
   public static final String GEN_AI_REQUEST_TOP_P = "gen_ai.request.top_p";