Add Lizard (LZ5) (#13456)

* Add Lizard (LZ5)

Add a new package for Lizard, formerly LZ5, a very fast compressor
and decompressor library.

* c-blosc2: use external lizard

Use an external Lizard (LZ5) dependency and add missing
"when="s for other compressor dependents.

var/spack/repos/builtin/packages/c-blosc2/package.py

@@ -32,12 +32,11 @@ class CBlosc2(CMakePackage):
             description='support for ZSTD')
 
     depends_on('cmake@2.8.10:', type='build')
-    # TODO https://github.com/inikep/lizard/issues/21
-    # depends_on('lizard')
-    depends_on('lz4')
-    depends_on('snappy')
-    depends_on('zlib')
-    depends_on('zstd')
+    depends_on('lizard', when='+lizard')
+    depends_on('lz4', when='+lz4')
+    depends_on('snappy', when='+snappy')
+    depends_on('zlib', when='+zlib')
+    depends_on('zstd', when='+zstd')
 
     def cmake_args(self):
         spec = self.spec
@@ -53,8 +52,7 @@ def cmake_args(self):
                 'ON' if '~zlib' in spec else 'OFF'),
             '-DDEACTIVATE_ZSTD={0}'.format(
                 'ON' if '~zstd' in spec else 'OFF'),
-            # TODO https://github.com/inikep/lizard/issues/21
-            '-DPREFER_EXTERNAL_LIZARD=OFF',
+            '-DPREFER_EXTERNAL_LIZARD=ON',
             '-DPREFER_EXTERNAL_LZ4=ON',
             # snappy is supported via external install only
             '-DPREFER_EXTERNAL_ZLIB=ON',