### Godot version

Godot 4.0 Beta 11

### System information

Linux Ubunutu

### Issue description

Godot's 3.x project converter to 4.0 seems to be missing the conversion for two drag data related functions.

In 3.x the function for can drop data, was named  `can_drop_data` in 4.0 it is `_can_drop_data`.
And likewise 3.x had `drop_data` and 4.0 has `_drop_data`.

These two functions were not converted by the project converter (and were hard to notice)!


### Steps to reproduce

Convert a 3.x project to 4.0 with the functions: `can_drop_data` it will not convert to `_can_drop_data` nor `drop_data` to `_drop_data`.



### Minimal reproduction project

N/A
for (String &line : lines) {
		if (uint64_t(line.length()) <= maximum_line_length) {
			String old;
			old = line;
			line = reg_container.keyword_csharp_remote.sub(line, "[RPC(MultiplayerAPI.RPCMode.AnyPeer)]", true);
			if (old != line) {
				found_renames.append(line_formatter(current_line, "[Remote]", "[RPC(MultiplayerAPI.RPCMode.AnyPeer)]", line));
			
			old = line;
			line = reg_container.keyword_csharp_remotesync.sub(line, "[RPC(MultiplayerAPI.RPCMode.AnyPeer, CallLocal = true)]", true);
			if (old != line) {
				found_renames.append(line_formatter(current_line, "[RemoteSync]", "[RPC(MultiplayerAPI.RPCMode.AnyPeer, CallLocal = true)]", line));
			
			old = line;
			line = reg_container.keyword_csharp_puppet.sub(line, "[RPC]", true);
			if (old != line) {
				found_renames.append(line_formatter(current_line, "[Puppet]", "[RPC]", line));
			
			old = line;
			line = reg_container.keyword_csharp_puppetsync.sub(line, "[RPC(CallLocal = true)]", true);
			if (old != line) {
				found_renames.append(line_formatter(current_line, "[PuppetSync]", "[RPC(CallLocal = true)]", line));
			
			old = line;
			line = reg_container.keyword_csharp_master.sub(line, "[RPC]", true);
			if (old != line) {
				found_renames.append(line_formatter(current_line, "[Master]", "[RPC]", line));
			
			old = line;
			line = reg_container.keyword_csharp_mastersync.sub(line, "[RPC(CallLocal = true)]", true);