fs: add helper fs_file_read_do_trace()

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8O4U8


CVE: NA

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fs_file_read_do_trace() uses writable-tracepoint to update f_mode
for file read procedure. Also export it to make it being usable
for filesystem kernel module.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>