Bump the Meson version to 0.57.1

- Meson version 0.57 now supports multi thread support during
  the link time optimization, so our compilations can get much
  better for repos like bmcweb which uses the LTO.

- For more details check the below Meson issue:
  https://github.com/mesonbuild/meson/issues/7820

- With the latest poky update (90fd73cb556c0db84e45514413a68f9c5e1aea22),
  Meson in yocto had already moved to 0.57.1, so we can bump up the
  version used in CI too.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: I0114fe8498f9624ad8bce0ce909267d1412cad7b
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 773f014..0ee4fda 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -820,7 +820,7 @@
 RUN pip3 install inflection
 RUN pip3 install pycodestyle
 RUN pip3 install jsonschema
-RUN pip3 install meson==0.54.3
+RUN pip3 install meson==0.57.1
 RUN pip3 install protobuf
 """