Use self-hosted Bazel cache (typedb#190)

## What is the goal of this PR?

Speed up CI by using self-hosted remote Bazel cache

## What are the changes implemented in this PR?

Import `/opt/credentials/bazel-remote-cache.rc`which configures remote caching

Author: vmax

.bazelrc

@@ -20,3 +20,5 @@
 build --incompatible_strict_action_env
 run --incompatible_strict_action_env
 test --incompatible_strict_action_env --test_env=PATH
+
+try-import /opt/credentials/bazel-remote-cache.rc