Make exec cfg check for //go stricter (#3867)

See bazelbuild/bazel#14444 (comment).

go/private/rules/go_bin_for_host.bzl

@@ -19,7 +19,7 @@ def _ensure_target_cfg(ctx):
  # A target is assumed to be built in the target configuration if it is neither in the exec nor
  # the host configuration (the latter has been removed in Bazel 6). Since there is no API for
  # this, use the output directory to determine the configuration, which is a common pattern.
- if "-exec-" in ctx.bin_dir.path or "/host/" in ctx.bin_dir.path:
+ if "-exec" in ctx.bin_dir.path or "/host/" in ctx.bin_dir.path:
  fail("//go is only meant to be used with 'bazel run', not as a tool. " +
  "If you need to use it as a tool (e.g. in a genrule), please " +
  "open an issue at " +