autoninja: Replace ninjalog_uploader_wrapper.py and reclient_metrics.py with build_telemetry.py

This CL unifies the opt-in/opt-out handling for build telemetry collections about Reclient and Ninjalog.

The user consent message will be displayed only once at the beginning of a build.

```
❯ autoninja -C out/deterministic-andorid-dbg base
*** NOTICE ***
Google-internal telemetry (including build logs, username, and hostname) is collected on corp machines to diagnose performance and fix build issues. This reminder will be shown 9 more times. See http://go/chrome-build-telemetry for details. Hide this notice or opt out by running: build_telemetry [opt-in] [opt-out]
*** END NOTICE ***

Proxy started successfully.
...
```

Bug: 345113094
Change-Id: Ie5886287c4bd20262be0ff247508ac3869441eb1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5669094
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
Reviewed-by: Michael Savigny <msavigny@google.com>
Commit-Queue: Junji Watanabe <jwata@google.com>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>

ninjalog_uploader.py

@@ -29,6 +29,8 @@ import sys
 import time
 import urllib.request
 
+import build_telemetry
+
 # These build configs affect build performance.
 ALLOWLISTED_CONFIGS = (
     "android_static_analysis",
@@ -51,26 +53,6 @@ ALLOWLISTED_CONFIGS = (
 )
 
 
-def IsGoogler():
-    """Check whether this user is Googler or not."""
-    p = subprocess.run(
-        "cipd auth-info",
-        stdout=subprocess.PIPE,
-        stderr=subprocess.PIPE,
-        text=True,
-        shell=True,
-    )
-    if p.returncode != 0:
-        return False
-    lines = p.stdout.splitlines()
-    if len(lines) == 0:
-        return False
-    l = lines[0]
-    # |l| will be like 'Logged in as <user>@google.com.' for googler using
-    # reclient.
-    return l.startswith("Logged in as ") and l.endswith("@google.com.")
-
-
 def ParseGNArgs(gn_args):
     """Parse gn_args as json and return config dictionary."""
     configs = json.loads(gn_args)
@@ -226,8 +208,10 @@ def main():
         # Disable logging.
         logging.disable(logging.CRITICAL)
 
-    if not IsGoogler():
-        return 0
+    cfg = build_telemetry.load_config()
+    if not cfg.is_googler:
+        logging.warning("Not Googler. Only Googlers can upload ninjalog.")
+        return 1
 
     ninjalog = args.ninjalog or GetNinjalog(args.cmdline)
     if not os.path.isfile(ninjalog):