chore(release): publish vendored mimalloc crates (#563)

- Prefix regorus- to mimalloc crates and add MIT licenses
- alias dependencies to avoid code changes
- add versions and release-plz publish entries
- update Cargo.lock files for new crate names

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

release-plz.toml

@@ -12,6 +12,16 @@ git_release_enable = true
 changelog_update = true
 publish = true
 
+[[package]]
+name = "regorus-mimalloc"
+publish = true
+changelog_update = false
+
+[[package]]
+name = "regorus-mimalloc-sys"
+publish = true
+changelog_update = false
+
 [[package]]
 name = "xtask"
 release = false