Unconditionally enable SHA-NI extensions (#11711)

We rely on this extension to accelerate computation of SHA2 hashes
quickly. This extension not being present will slow down node beyond
what's reasonable and the node will not be able to keep up with others.
Enabling this extension unconditionally and having the node fail early
on machines where the extension is not available seems like a reasonable
option here.

.cargo/config.toml

@@ -4,4 +4,4 @@
 rustflags = ["-Cforce-unwind-tables=y"]
 
 [target.'cfg(target_arch = "x86_64")']
-rustflags = ["-Ctarget-feature=+sse4.1,+sse4.2", "-Cforce-unwind-tables=y"]
+rustflags = ["-Ctarget-feature=+sse2,+ssse3,+sse4.1,+sse4.2,+sha", "-Cforce-unwind-tables=y"]