Update templates for php7 and php7_protobuf_c examples (#26578)

* Update templates for php7 and php7_protobuf_c examples
* Update templates and loadtest_examples.sh

tools/run_tests/performance/loadtest_examples.sh

@@ -42,6 +42,10 @@ example_file() {
         echo "python_asyncio${suffix}"
         return
     fi
+    if [[ "${scenario#php7_protobuf_c_}" != "${scenario}" ]]; then
+        echo "php7_protobuf_c${suffix}"
+        return
+    fi
     echo "${scenario%%_*}${suffix}"
 }
 
@@ -55,6 +59,10 @@ example_language() {
         echo "python_asyncio"
         return
     fi
+    if [[ "${filename#php7_protobuf_c_}" != "${filename}" ]]; then
+        echo "php7_protobuf_c"
+        return
+    fi
     echo "${filename%%_*}"
 }
 
@@ -65,6 +73,7 @@ scenarios=(
     "java_generic_async_streaming_ping_pong_secure"
     "node_to_node_generic_async_streaming_ping_pong_secure"
     "php7_protobuf_php_extension_to_cpp_protobuf_sync_unary_ping_pong"
+    "php7_protobuf_c_extension_to_cpp_protobuf_sync_unary_ping_pong"
     "python_generic_sync_streaming_ping_pong"
     "python_asyncio_generic_async_streaming_ping_pong"
     "ruby_protobuf_sync_streaming_ping_pong"

tools/run_tests/performance/templates/loadtest_template_basic_all_languages.yaml

@@ -121,9 +121,30 @@ spec:
     language: php7
     pool: ${client_pool}
     run:
+      args:
+      - -c
+      - |
+        timeout --kill-after="${KILL_AFTER}" "${POD_TIMEOUT}" \
+        /run_scripts/run_worker.sh
+      command:
+      - bash
+  - build:
+      command:
+      - bash
+      - /build_scripts/build_qps_worker.sh
+    clone:
+      gitRef: master
+      repo: https://github.com/grpc/grpc.git
+    language: php7_protobuf_c
+    pool: ${client_pool}
+    run:
+      args:
+      - -c
+      - |
+        timeout --kill-after="${KILL_AFTER}" "${POD_TIMEOUT}" \
+        /run_scripts/run_protobuf_c_worker.sh
       command:
       - bash
-      - /run_scripts/run_worker.sh
   - build:
       args:
       - build
@@ -181,6 +202,9 @@ spec:
             src/ruby/qps/worker.rb --driver_port="${DRIVER_PORT}"
       command:
       - bash
+  driver:
+    language: cxx
+    run: {}
   results:
     bigQueryTable: ${big_query_table}
   servers:

tools/run_tests/performance/templates/loadtest_template_prebuilt_all_languages.yaml

@@ -77,10 +77,25 @@ spec:
   - language: php7
     pool: ${client_pool}
     run:
+      args:
+      - -c
+      - |
+        timeout --kill-after="${KILL_AFTER}" "${POD_TIMEOUT}" \
+        /run_scripts/run_worker.sh
+      command:
+      - bash
+      image: ${prebuilt_image_prefix}/php7:${prebuilt_image_tag}
+  - language: php7_protobuf_c
+    pool: ${client_pool}
+    run:
+      args:
+      - -c
+      - |
+        timeout --kill-after="${KILL_AFTER}" "${POD_TIMEOUT}" \
+        /run_scripts/run_protobuf_c_worker.sh
       command:
       - bash
-      - /run_scripts/run_worker.sh
-      image: ${prebuilt_image_prefix}/php:${prebuilt_image_tag}
+      image: ${prebuilt_image_prefix}/php7:${prebuilt_image_tag}
   - language: python
     pool: ${client_pool}
     run: