[QNN-EP] Use same power votes as burst for SHP (microsoft#26465)

### Description
Use same HTP voltage corner votes as burst for
sustained_high_performance


### Motivation and Context
Increases performance without DSPQ polling and utilizes the expected
voltage mappings

Co-authored-by: quic_calvnguy <quic_calvnguy@quic_inc.com>

Author: quic-calvnguy

onnxruntime/core/providers/qnn/builder/qnn_backend_manager.cc

@@ -1389,6 +1389,7 @@ Status QnnBackendManager::SetHtpPowerConfig(uint32_t htp_power_config_client_id,
   // choose performance mode
   switch (htp_performance_mode) {
     case HtpPerformanceMode::kHtpBurst:
+    case HtpPerformanceMode::kHtpSustainedHighPerformance:
       dcvs_v3.setSleepLatency = 1;  // true
       dcvs_v3.sleepLatency = kSleepMinLatency;
       dcvs_v3.dcvsEnable = kDcvsDisable;
@@ -1401,7 +1402,6 @@ Status QnnBackendManager::SetHtpPowerConfig(uint32_t htp_power_config_client_id,
       dcvs_v3.coreVoltageCornerTarget = DCVS_VOLTAGE_VCORNER_MAX_VOLTAGE_CORNER;
       dcvs_v3.coreVoltageCornerMax = DCVS_VOLTAGE_VCORNER_MAX_VOLTAGE_CORNER;
       break;
-    case HtpPerformanceMode::kHtpSustainedHighPerformance:
     case HtpPerformanceMode::kHtpHighPerformance:
       dcvs_v3.setSleepLatency = 1;  // true
       dcvs_v3.sleepLatency = kSleepLowLatency;