Bump bazel version to 8.6.0 for own fix (#47011)

### What does this PR do?
Bump `bazel` version from 8.5.1 to 8.6.0 to benefit from a series of improvements and fixes.
Ours (bazelbuild/bazel#28367) allows to re-enable "convenience symlinks" for Windows users and makes [`path.realpath`](https://bazel.build/rules/lib/builtins/path#realpath) succeed when sharing a folder between a Linux host and a Windows VM.

### Motivation
Selected changes between 8.5.1 and 8.6.0:
- 💡 bazelbuild/bazel#28001
- bazelbuild/bazel#28012
- 💡 bazelbuild/bazel#28189
- bazelbuild/bazel#28277
- bazelbuild/bazel#28343
- 🐕 bazelbuild/bazel#28367
- bazelbuild/bazel#28529
- bazelbuild/bazel#28538
- bazelbuild/bazel#28551
- bazelbuild/bazel#28722

Co-authored-by: regis.desgroppes <regis.desgroppes@datadoghq.com>

Author: rdesgroppes

.bazelrc

@@ -41,8 +41,6 @@ common:macos --remote_local_fallback_strategy=sandboxed
 
 # Windows config -------------------------------------------------------------------------------------------------------
 common:windows --strategy=standalone # Valid values are: [dynamic_worker, standalone, dynamic, remote, worker, local]
-# For whatever reason if convenience symlinks are present, the build fails on Windows.
-common:windows --noexperimental_convenience_symlinks
 # Neither repo_env nor shell_executable affect action keys. It can be both an advantage and a disadvantage.
 # For instance, if we need to have some special behavior in bash we can add it, however, in some cases
 # it may lead to cache poisoning.

.bazelversion

@@ -1 +1 @@
-8.5.1
+8.6.0