ci: Update Conan to 2.22.2 (#6019)

This updates the CI image hashes after following change: https://github.com/XRPLF/ci/pull/81. And, since we use latest Conan, we can have `conan.lock` with a newline at the end, and we don't need to exclude it from `pre-commit` hooks any longer.

.pre-commit-config.yaml

@@ -34,6 +34,5 @@ repos:
 exclude: |
   (?x)^(
       external/.*|
-      .github/scripts/levelization/results/.*\.txt|
-      conan\.lock
+      .github/scripts/levelization/results/.*\.txt
   )$

conan.lock

@@ -53,4 +53,4 @@
         ]
     },
     "config_requires": []
-}
+}