RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/encoding_rs/doc/UTF-16LE.txt

@@ -0,0 +1,8 @@
+/// This decode-only encoding uses 16-bit code units due to Unicode originally
+/// having been designed as a 16-bit reportoire. In the absence of a byte order
+/// mark the little endian byte order is assumed.
+///
+/// There is no corresponding encoder in this crate or in the Encoding
+/// Standard. The output encoding of this encoding is UTF-8.
+///
+/// This encoding matches the Windows code page 1200.