CAMEL-23716: align RawPayloadTest header constants with renamed Salesforce headers (#1833)

The CAMEL-23716 commit renamed Salesforce header string values from short
names (sObjectId, sObjectIdValue) to CamelSalesforce-prefixed names
(CamelSalesforceSObjectId, CamelSalesforceSObjectIdValue). The plain Camel
test was updated but the camel-spring-boot copy still used hardcoded literal
strings, causing 10/39 test variants to fail.

Use SalesforceEndpointConfig constants instead of literal strings.

Author: mcarlett

components-starter/camel-salesforce-starter/src/test/java/org/apache/camel/component/salesforce/springboot/RawPayloadTest.java

@@ -167,8 +167,8 @@ private void setupRequestResponse(String format, String endpointUri) {
                 requestBody = "{ \"request\" : \"mock\" }";
             }
             headers = new HashMap<>();
-            headers.put("sObjectId", "mockId");
-            headers.put("sObjectIdValue", "mockIdValue");
+            headers.put(SalesforceEndpointConfig.SOBJECT_ID, "mockId");
+            headers.put(SalesforceEndpointConfig.SOBJECT_EXT_ID_VALUE, "mockIdValue");
             headers.put("id", "mockId");
             headers.put(SalesforceEndpointConfig.APEX_QUERY_PARAM_PREFIX + "id", "mockId");