Add SSE stream_format support for audio speech streaming (#4490)

Signed-off-by: syd520zy <529477025@qq.com>
Signed-off-by: faceless void <100186390+syd520zy@users.noreply.github.com>
Signed-off-by: Nick Cao <ncao@redhat.com>
Signed-off-by: Chendi Xue <chendi.xue@intel.com>
Signed-off-by: kTorp <Kristoffer.Torp@amd.com>
Signed-off-by: Junhong Liu <98734602+LJH-LBJ@users.noreply.github.com>
Signed-off-by: Hongsheng Liu <liuhongsheng4@huawei.com>
Signed-off-by: Hyoseop Song <crad_on25@naver.com>
Signed-off-by: Hyoseop Song  <crad_on25@naver.com>
Signed-off-by: amy-why-3459 <wuhaiyan17@huawei.com>
Co-authored-by: Nick Cao <ncao@redhat.com>
Co-authored-by: Chendi.Xue <chendi.xue@intel.com>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>
Co-authored-by: Kristoffer <kristoffer.torp@amd.com>
Co-authored-by: Junhong Liu <ljh_lbj@163.com>
Co-authored-by: lishunyang <lishunyang12@163.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Hyoseop Song <crad_on25@naver.com>
Co-authored-by: Zhou Taichang <tzhouam@connect.ust.hk>
Co-authored-by: Alicia <115451386+congw729@users.noreply.github.com>
Co-authored-by: amy-why-3459 <wuhaiyan17@huawei.com>

tests/dfx/reliability/invalid_param_test/test_invalid_audio_speech.py

@@ -122,9 +122,6 @@ def test_speech_missing_required_fields(omni_server: OmniServer, openai_client:
             {"response_format": "mpeg"}, ("response_format", "literal_error", "wav"), id="response_format_invalid"
         ),
         pytest.param({"stream_format": 1}, ("stream_format", "literal_error", "audio"), id="stream_format_wrong_type"),
-        pytest.param(
-            {"stream_format": "sse"}, ("stream_format", "value_error", "audio"), id="stream_format_sse_blocked"
-        ),
         pytest.param({"stream": "wrong_type"}, ("stream", "bool_parsing", "validation error"), id="stream_wrong_type"),
         pytest.param(
             {