[roll] Roll fuchsia [bazel_migration] Migrate clippy-reporter and rfcmeta tool

1. Remove the BUILD.gn file because all targets are migrated.
2. Add entries to `tools_bazel_root_targets` list to bridge Bazel
   built tools to GN build system.
3. Modified references to the migrated GN target to the new
   target in //build/bazel/host package
4. Add `install_host_tool = true` for the clippy_reporter entry
   in bazel_root_targets_list.gni to add it to tool_paths.json

Original-Original-Bug: 543661490

      @//tools/staticanalysis/rfcmeta
      //build/bazel/host:bazel_root_host_tools.clippy-reporter.host_tool \
      //build/bazel/host:bazel_root_host_tools.rfcmeta.host_tool

Test: fx build --host @//tools/staticanalysis/clippy-reporter \
Test: fx bazel test --config=host //tools:host_tests
Test: fx build --host \
Test: fx build //build/bazel/rules/tests:quick_tests
Test: fx set core.x64 && fx build
Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1759693
Original-Original-Revision: a48041f5511807bcd3b8d6520a113a61a653b54b
GitOrigin-RevId: 9840974543dba520b3776be46e848533bf520746
Change-Id: Ieba85c393f0f2ff5b0071ecfeb1a1d0949f977d0
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1769237
Cr-Commit-Position: refs/heads/main@{#199866}