[Misc] Ignore ep_kernels_workspace (vllm-project#22807)

Signed-off-by: Jee Jee Li <pandaleefree@gmail.com>
Signed-off-by: Xiao Yu <xiao.yu@amd.com>

Author: jeejeelee

.gitignore

@@ -207,3 +207,6 @@ shellcheck*/
 
 # Ignore moe/marlin_moe gen code
 csrc/moe/marlin_moe_wna16/kernel_*
+
+# Ignore ep_kernels_workspace folder
+ep_kernels_workspace/