xbps-src: multiple performance improvements

- use xbps-checkvers(1) to resolve dependencies.
- all dependencies are installed at once for the host and target.
- the show-build-deps target is now much faster.
- the update-bulk/show-repo-updates targets are now much faster.
- the update-sys/show-sys-updates targets are now much faster.
- the bootstrap target now works on musl hosts.
- simplified some loops.
- use cut(1) rather than awk(1) where applicable.
- multiple random changes to improve performance.

Based on work started by @Duncaen on #12433

Close #12433
Close #11282

common/xbps-src/shutils/pkgtarget.sh

@@ -54,6 +54,10 @@ remove_pkg_autodeps() {
     $XBPS_RECONFIGURE_CMD -a >> $tmplogf 2>&1
     echo yes | $XBPS_REMOVE_CMD -Ryod >> $tmplogf 2>&1
     rval=$?
+    if [ $rval -eq 0 ]; then
+        echo yes | $XBPS_REMOVE_CMD -Ryod >> $tmplogf 2>&1
+        rval=$?
+    fi
 
     if [ $rval -ne 0 ]; then
         msg_red "${pkgver:-xbps-src}: failed to remove autodeps: (returned $rval)\n"