[libc][bazel] Remove customization from several libc BUILD rules. (#121843)

Get rid of the following arguments to libc_support_library and
libc_function rules:

* `defines` (for raw_mutex.h) - it wasn't used correctly (e.g. didn't
provide actual value for spin count), and we can instead fallback to
defaults set in the header itself (or rely on library-level configure
options).
* `features` - there's no need to disable sanitization for a subset of
memory functions -- it generally should be the vendor / user
responsibility to control it (e.g. don't include instrumented libc
functions in the build, since they would be provided by sanitizer
runtimes instead).
* `local_defines` (for printf_parser) - no longer needed, since
LIBC_COPT_MOCK_ARG_LIST has been removed in
e0be78be427931e94d287002b9c3910f6bc6a22c

This also removes two ad-hoc BUILD rules (strcpy_sanitized and
printf_mock_parser) which are no longer needed and can be replaced by
strcpy and printf_parser, respectively.

Co-authored-by: Alexey Samsonov <samsonov@google.com>

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