Allow for . in beta binaries status check of archive EA filename

[andrew-m-leonard]

New beta EA filename has "." in the version part of the filename, the nightly_build_and_test_stats.groovy regex needs updating to match it correctly.

[github-actions]

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[sxa]

I'm a bit nervous as to why \. was in there in the first place in case this breaks something, but I guess it's easily fixable if it causes a problem so I'm approving.

Noting that the old versions had a name like this:

• OpenJDK21U-jdk_aarch64_linux_hotspot_ea_21-0-1-12.tar.gz

And the new one is:

• OpenJDK21U-jdk_aarch64_linux_hotspot_ea_21.0.3-0-1.tar.gz

See adoptium/temurin-build#3355 (comment) for the reasons why it was done with hyphens originally - it was to do the minimal amount of work needed to avoid changing the existing release tool job.

[andrew-m-leonard]

I'm a bit nervous as to why \. was in there in the first place in case this breaks something, but I guess it's easily fixable if it causes a problem so I'm approving.

Noting that the old versions had a name like this:

* [OpenJDK21U-jdk_aarch64_linux_hotspot_ea_21-0-1-12.tar.gz](https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.1%2B12-ea-beta/OpenJDK21U-jdk_aarch64_linux_hotspot_ea_21-0-1-12.tar.gz)

And the new one is:

* [OpenJDK21U-jdk_aarch64_linux_hotspot_ea_21.0.3-0-1.tar.gz](https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.3%2B1-ea-beta/OpenJDK21U-jdk_aarch64_linux_hotspot_ea_21.0.3-0-1.tar.gz)

See adoptium/temurin-build#3355 (comment) for the reasons why it was done with hyphens originally - it was to do the minimal amount of work needed to avoid changing the existing release tool job.

I think basically I over did it last time !