mega-melt: skip lifecycle when installing POM

We do not need to perform the entire Maven lifecycle just to install the
doctored 999-mega-melt version of the pom-scijava parent into the local
repository cache. We can just invoke the install:install goal directly.

Not only does this speed up the mega-melt slightly (e.g. no enforcer
checks), it also avoids an issue whereby the Gradle platform+catalog
build would fail due to being in the wrong working/base directory.

Author: ctrueden

tests/run.sh

@@ -52,7 +52,7 @@ shortVersionClashes=\
 rm -rf "$megaMeltDir" && mkdir -p "$megaMeltDir" || die "Creation of $megaMeltDir failed!"
 cp "$pom" "$pomParent" &&
 mvn -B -f "$pomParent" versions:set -DnewVersion=999-mega-melt > "$versionSwapLog" &&
-  mvn -B -f "$pomParent" install >> "$versionSwapLog" ||
+  mvn -B -f "$pomParent" install:install >> "$versionSwapLog" ||
   die "pom-scijava version update failed:\n$(cat "$versionSwapLog")"
 python "$generateMegaMeltScript" "$megaMeltDir" || die 'Generation failed!'
 sectionEnd # Generating mega-melt project