Fix BuildPulse handling

- be more verbose with output to be clear when we're using/submitting to
  BuildPulse
- remove the duplicate BuildPulse submission step

.github/workflows/tests.yml

@@ -333,14 +333,3 @@ jobs:
       - run: brew test-bot --only-formulae --test-default-formula
 
       - uses: codecov/codecov-action@29386c70ef20e286228c72b668a06fd0e8399192
-
-      - name: Upload test results to BuildPulse for flaky test detection
-        # Only run this step for non-PR pushes or PRs where where we have access to secrets.
-        # Run this step even when the tests fail. Skip if the workflow is cancelled.
-        if: (github.event.pull_request == null || github.event.pull_request.head.repo.full_name == github.repository) && !cancelled()
-        env:
-          BUILDPULSE_ACCESS_KEY_ID: ${{ secrets.BUILDPULSE_ACCESS_KEY_ID }}
-          BUILDPULSE_SECRET_ACCESS_KEY: ${{ secrets.BUILDPULSE_SECRET_ACCESS_KEY }}
-        run: |
-          brew install buildpulse-test-reporter
-          buildpulse-test-reporter submit Library/Homebrew/test/junit --account-id 1503512 --repository-id 53238813

Library/Homebrew/dev-cmd/tests.rb

@@ -50,14 +50,18 @@ module Homebrew
 
     unless Formula["buildpulse-test-reporter"].any_version_installed?
       ohai "Installing `buildpulse-test-reporter` for reporting test flakiness..."
+      with_env(HOMEBREW_NO_AUTO_UPDATE: "1", HOMEBREW_NO_BOOTSNAP: "1") do
         safe_system HOMEBREW_BREW_FILE, "install", "buildpulse-test-reporter"
       end
+    end
 
     ENV["BUILDPULSE_ACCESS_KEY_ID"] = ENV["HOMEBREW_BUILDPULSE_ACCESS_KEY_ID"]
     ENV["BUILDPULSE_SECRET_ACCESS_KEY"] = ENV["HOMEBREW_BUILDPULSE_SECRET_ACCESS_KEY"]
 
+    ohai "Sending test results to BuildPulse"
+
     safe_system Formula["buildpulse-test-reporter"].opt_bin/"buildpulse-test-reporter",
-                "submit", "Library/Homebrew/test/junit",
+                "submit", "#{HOMEBREW_LIBRARY_PATH}/test/junit",
                 "--account-id", ENV["HOMEBREW_BUILDPULSE_ACCOUNT_ID"],
                 "--repository-id", ENV["HOMEBREW_BUILDPULSE_REPOSITORY_ID"]
   end
@@ -182,7 +186,10 @@ module Homebrew
 
       # Submit test flakiness information using BuildPulse
       # BUILDPULSE used in spec_helper.rb
-      ENV["BUILDPULSE"] = "1" if use_buildpulse?
+      if use_buildpulse?
+        ENV["BUILDPULSE"] = "1"
+        ohai "Running tests with BuildPulse-friendly settings"
+      end
 
       if parallel
         system "bundle", "exec", "parallel_rspec", *parallel_args, "--", *bundle_args, "--", *files