Simplify argument parsing (#459)

With the current state of automation scripts, this is not possible anymore to launch script with multiple auto configs.

src/php.py

@@ -1,15 +1,16 @@
-from common import dates, http, releasedata
+from common import dates, http
+from common.releasedata import ProductData, config_from_argv
 
-for config in releasedata.list_configs_from_argv():
-    with releasedata.ProductData(config.product) as product_data:
-        # Fetch major versions
-        latest_by_major = http.fetch_url(config.url).json()
-        major_version_urls = [f"{config.url}&version={major_version}" for major_version in latest_by_major]
+config = config_from_argv()
+with ProductData(config.product) as product_data:
+    # Fetch major versions
+    latest_by_major = http.fetch_url(config.url).json()
+    major_version_urls = [f"{config.url}&version={major_version}" for major_version in latest_by_major]
 
-        # Fetch all versions for major versions
-        for major_versions_response in http.fetch_urls(major_version_urls):
-            major_versions_data = major_versions_response.json()
-            for version in major_versions_data:
-                if config.first_match(version):  # exclude versions such as "3.0.x (latest)"
-                    date = dates.parse_date(major_versions_data[version]["date"])
-                    product_data.declare_version(version, date)
+    # Fetch all versions for major versions
+    for major_versions_response in http.fetch_urls(major_version_urls):
+        major_versions_data = major_versions_response.json()
+        for version in major_versions_data:
+            if config.first_match(version):  # exclude versions such as "3.0.x (latest)"
+                date = dates.parse_date(major_versions_data[version]["date"])
+                product_data.declare_version(version, date)