Merge bitcoin/bitcoin#33929: test: Remove system_tests/run_command runtime dependencies

97e7e79435 test: Enable `system_tests/run_command` "stdin" test on Windows (Hennadii Stepanov)
a4324ce095 test: Remove `system_tests/run_command` runtime dependencies (Hennadii Stepanov)

Pull request description:

  `system_tests` currently rely on `cat`, `echo`, `false` and `sh` being available in `PATH` at runtime.

  This PR:
  1. Removes these dependencies.
  2. Reduces the number of platform-specific code paths.

  The change is primarily motivated by my work on maintaining the [`bitcoin-core`](https://packages.guix.gnu.org/packages/bitcoin-core) package in Guix. It enables the removal of the existing `bash` and `coreutils` native inputs, which in turn makes it possible to drop the implicit dependency on `qtbase@5` (see https://codeberg.org/guix/guix/pulls/4386#issuecomment-8613333).

ACKs for top commit:
  maflcko:
    re-ACK 97e7e79435 👓
  janb84:
    ACK 97e7e79435
  sedited:
    ACK 97e7e79435

Tree-SHA512: 1375c676f85c75d571df1ddfc3a4405767dbf0ed7bfea2927c93ec01b29f9f7ae3383e546d2658f595e8ffafa9ab20bba6fcc628a9f5ebdb288bbef03b645fb6

test/lint/lint-includes.py

@@ -21,6 +21,7 @@ EXCLUDED_DIRS = ["contrib/devtools/bitcoin-tidy/",
                 ] + SHARED_EXCLUDED_SUBTREES
 
 EXPECTED_BOOST_INCLUDES = [
+                           "boost/cstdlib.hpp",
                            "boost/multi_index/detail/hash_index_iterator.hpp",
                            "boost/multi_index/hashed_index.hpp",
                            "boost/multi_index/identity.hpp",