fix: match graalvm job names with internal configs (#3755)

Fixes error from
https://fusion2.corp.google.com/invocations/e3010c7e-ee63-4a12-ae04-e2dae7766bbe/targets/cloud-devrel%2Fclient-libraries%2Fjava%2Fjava-storage%2Fpresubmit%2Fgraalvm-native-a/log

This is due to the name of the jobs not matching what was submitted in
cl/750211040

```
[09:45:52 PDT] Job config validated!
[09:45:52 PDT] Resolving Github Scm Revision State
[09:45:56 PDT] Running git -c core.hooksPath=/dev/null clone https://github.com/googleapis/java-storage.git /tmp/workspace/workspace/src/github/java-storage
[09:45:57 PDT] Fetching GitHub java-storage@PR#3050.  This code is considered not submitted as it's coming from a pull request.
[09:45:57 PDT] Running git -c core.hooksPath=/dev/null fetch origin pull/3050/merge:pull_branch
[09:45:58 PDT] Running git -c core.hooksPath=/dev/null checkout pull_branch --
[09:45:58 PDT] Running git -c core.hooksPath=/dev/null rev-parse --verify HEAD
[09:45:58 PDT][ERROR] Build failed due to an error
com.google.devtools.kokoro.controller.UserException: An error happened while reading and parsing the build config
	at com.google.devtools.kokoro.jenkins.plugin.executor.BuilderStepsProvider.provide(BuilderStepsProvider.java:55)
	at com.google.devtools.kokoro.controller.build.PipelineBuildExecutor.runPipeline(PipelineBuildExecutor.java:92)
	at com.google.devtools.kokoro.controller.build.PipelineBuildExecutor.lambda$start$0(PipelineBuildExecutor.java:67)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: com.google.devtools.kokoro.controller.UserException: APPLICATION_ERROR;devtools.kokoro.executor.proto/KokoroExecutorWorker.ReadBuildConfig;no file found at path 'src/github/java-storage/.kokoro/presubmit/graalvm-native-a' or with allowed extensions invalid argument;AppErrorCode=3;StartTimeMs=1745340358647;tcp;Deadline(sec)=300.0;ResFormat=uncompressed;interceptors={[com.google.frameworks.debug.sherlog.core.rpcutil.Stubby3ClientInterceptor];overrides={}};ServerTimeSec=5.21036E-4;LogBytes=256;FailFast;EffSecLevel=none;ReqFormat=uncompressed;ReqID=3534e3e8629380d4;GlobalID=0;Server=[2002:a4f:c6c1:0:b0:422:a3e6:c419]:14001
	at com.google.devtools.kokoro.jenkins.shared.worker.ExecutorHelperClient.mapRpcException(ExecutorHelperClient.java:638)
	at com.google.devtools.kokoro.jenkins.shared.worker.ExecutorHelperClient.readBuildConfig(ExecutorHelperClient.java:529)
	at com.google.devtools.kokoro.jenkins.plugin.kokorojob.store.ConfigStore.getKokoroBuildConfigFromScm(ConfigStore.java:124)
	at com.google.devtools.kokoro.jenkins.plugin.kokorojob.store.ConfigStore.getKokoroBuildConfig(ConfigStore.java:93)
	at com.google.devtools.kokoro.jenkins.plugin.executor.BuilderStepsProvider.provide(BuilderStepsProvider.java:45)
	... 6 more
```

Author: diegomarquezp