Register Java 8 runtimes with Bzlmod

Copybara Import from https://github.com/bazelbuild/rules_java/pull/181

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Register Java 8 runtimes with Bzlmod (#181)

These runtimes were only registered when using WORKSPACE.

Work towards bazelbuild/bazel#21769

Closes #181
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COPYBARA_INTEGRATE_REVIEW=https://github.com/bazelbuild/rules_java/pull/181 from fmeum:java-8 7a05002ac90e6d561503a0dc89cacda7f8b14895
PiperOrigin-RevId: 621488116
Change-Id: I106d991108eaff91379f5391b5f908e7d5793aab