Make jmods available from the jdk BUILD file

Copybara Import from https://github.com/bazelbuild/rules_java/pull/184

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Make jmods available from the jdk BUILD file (#184)

The PR at https://github.com/bazelbuild/rules_java/pull/135 looks dormant, this makes the change requested at https://github.com/bazelbuild/rules_java/pull/135#issuecomment-1797985514

I don't need the entire change here, having the jmods as a filegroup is sufficient for using jlink, but @cushon suggested adding the files as sources to the java_runtime as well, if I understood him correctly, so I did that too. If that's not necessary, let me know and I'll remove that part.

Closes #184
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COPYBARA_INTEGRATE_REVIEW=https://github.com/bazelbuild/rules_java/pull/184 from srdo-humio:stig/jdk-with-jmods e1513dbb7e67fe7da4782eb602a8564da19e9bf5
PiperOrigin-RevId: 631308886
Change-Id: I455d1ff6abd8d5b92e0e25f92caed796fe019aec