[WIP] feat: extend string data filtering for other events

[rscampos]

1. Explain what the PR does

a964fc9 wip
41b8fa0 feat: extend string data filtering for other events
f8f0af6 feat: allow different field names

f8f0af6 feat: allow different field names

- Allow any field name in the in-kernel string filter.
- Currently, only one string-type field name is supported.
- Future support for multiple field names is planned.

2. Explain how to test it

3. Other comments

part of #4432

The LSM events with in-kernel filter will be handled in the PR #4590.
Others events with in-kernel filter (string filter):

Event	String Name	Type	Manually Tested
✅ sched_process_exec	pathname	other	Yes
✅ vfs_write	pathname	other	Yes
✅ vfs_writev	pathname	other	Yes
✅ vfs_read	pathname	other	Yes
✅ vfs_readv	pathname	other	Yes
✅ mem_prot_alert	pathname	other	Yes
✅ magic_write	pathname	other	Yes
✅ __kernel_write	pathname	other	Yes
✅ call_usermodehelper	pathname	other	Yes
✅ load_elf_phdrs	pathname	other	Yes
✅ do_mmap	pathname	other	Yes
✅ vfs_utimes	pathname	other	Yes
✅ do_truncate	pathname	other	Yes
✅ inotify_watch	pathname	other	Yes
✅ module_load	pathname	other	Yes
✅ chmod_common	pathname	other	Yes
✅ device_add	name	other	Yes
✅ do_init_module	name	other	Yes
✅ module_free	name	other	Yes
✅ proc_create	name	other	Yes
✅ register_chrdev	char_device_name	other	Yes
✅ debugfs_create_file	file_name	other	Yes
✅ debugfs_create_dir	name	other	Yes
✅ cgroup_mkdir	cgroup_path	other	Yes
✅ cgroup_rmdir	cgroup_path	other	Yes
✅ cgroup_attach_task	cgroup_path	other	Yes
✅ bpf_attach	prog_name	other	Yes
✅ kprobe_attach	symbol_name	other	Yes
✅ task_rename	old_name	other	Yes
✅ file_modification	file_path	other	Yes
✅ set_fs_pwd	resolved_path	other	Yes
✅ sched_switch	prev_comm	other	Yes
☑️ hidden_inodes	hidden_process	other	No
☑️ dirty_pipe_splice	in_file_path	other	No

✅ Fully working with the triggers
☑️ Working with caveats
hidden_inodes - data filter is working but the event need to be fixed (#4588) since don't act as expected.
dirty_pipe_splice - data filter is working but the trigger is not fully working yet