fix: release scripts from issuing overlapping phases (#432)

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/42e6b423-50a1-45f0-be87-e54e9aaf68d2/targets

- [ ] To automatically regenerate this PR, check this box. (May take up to 24 hours.)

Source-Link: googleapis/synthtool@8285c2b

java-core/.kokoro/release/snapshot.sh

@@ -25,7 +25,7 @@ grep SNAPSHOT versions.txt
 setup_environment_secrets
 create_settings_xml_file "settings.xml"
 
-mvn clean install deploy -B \
+mvn clean deploy -B \
   --settings ${MAVEN_SETTINGS_FILE} \
   -DperformRelease=true \
   -Dgpg.executable=gpg \

java-core/.kokoro/release/stage.sh

@@ -29,7 +29,7 @@ create_settings_xml_file "settings.xml"
 
 # attempt to stage 3 times with exponential backoff (starting with 10 seconds)
 retry_with_backoff 3 10 \
-  mvn clean install deploy -B \
+  mvn clean deploy -B \
     --settings ${MAVEN_SETTINGS_FILE} \
     -DskipTests=true \
     -DperformRelease=true \

java-core/synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-core.git",
-        "sha": "f982d38cf3dcf62c07031e7ac8b4c5708c0f14e0"
+        "sha": "db5dcdeda126258465ef85e0ed4f66e6320a63d3"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "082e1ca0863b13ada8594fe91845380765da5b70"
+        "sha": "8285c2b4cdbc3771d031ad91e1c4ec9e55fff45d"
       }
     }
   ],