Fix premature installation completion signal in Bloom installer.

This CL removes calls to `status_reporter_.Complete(**true**, success_msg)` within the `VerifyBundleSignature` and `GetOwnerConfig` methods. These functions represent intermediate steps in the installation process, not its completion, so we shouldn't mark the installation process as complete.

PiperOrigin-RevId: 930656122
Change-Id: Iafbbbb270d44ab73e1fe44b3312dce5d6eb81892
(cherry picked from commit ba359d6dda983c72ec15d52602e8316d8950a74d)

install/installer.cc

diff --git a/install/installer.cc b/install/installer.cc
index 6b1e7d3..bc03968 100644
--- a/install/installer.cc
+++ b/install/installer.cc
@@ -266,7 +266,6 @@
   const std::string success_msg = "Bundle signature check successful.";
   logger_.Log(State::kSuccess, absl::Now() - check_start_time, success_msg,
               LogCode::kBundleSignatureSuccess);
-  status_reporter_.Complete(true, success_msg);
   return true;
 }
 
@@ -330,7 +329,6 @@
   const std::string success_msg = "Successfully retrieved owner configuration";
   logger_.Log(State::kSuccess, absl::Now() - start_time, success_msg,
               LogCode::kGetOwnerConfigSuccess);
-  status_reporter_.Complete(true, success_msg);
   return config;
 }