textproc/elasticsearch7: Fix runtime with non-default USERS/GROUPS

Also:

• Respect ETCDIR substitution in rc.d script.
• Replace RM of bundled JDK, jna.jar and modules/x-pack/x-pack-ml files with EXTRACT_AFTER_ARGS=--exclude.
• Replace ${JAVASHAREDIR} with ${LOCALBASE}/share/java - JAVASHAREDIR=PREFIX/share/java, but devel/jna installed in LOCALBASE.

Approved by: blanket (fix runtime)
MFH: 2026Q1