Properly handle invalid credential files

to prevent Bazel sever from crashing.

The functions used to construct credentials could throw runtime exception which will crash Bazel server in which case the Bazel client will just exit silently.

Fixes #18755.

Closes #18770.

PiperOrigin-RevId: 543413376
Change-Id: I71238345f350caaac51f9cc9f654661a90cf6737

Author: coeuvre

src/main/java/com/google/devtools/build/lib/authandtls/GoogleAuthUtils.java

@@ -330,7 +330,7 @@ public static Credentials newGoogleCredentialsFromFile(
         creds = creds.createScoped(authScopes);
       }
       return creds;
-    } catch (IOException e) {
+    } catch (Exception e) {
       String message = "Failed to init auth credentials: " + e.getMessage();
       throw new IOException(message, e);
     }