### Godot version

v4.2.dev4.official [549fcce5f]

### System information

Ubuntu 20.04 LTS

### Issue description

See title.

### Steps to reproduce

1. Create a new project
2. Create a csv file that includes the following
```
key,ar
key,placeholder
```
3. Add the generated `.translation` file to Project -> Project Settings... -> Localization
4. In Project -> Project Settings... -> Internationalization -> Locale, set `Test` to `ar`
5. Add a `LineEdit` node and type `-=[]{}`
6. Run the project, and notice that the text is on the right side, but the symbols are incorrectly in LTR (`-=[]{}`).  Correct output is `{}[]=-`
7. Back in the editor, add a single Arabic letter (any will do), and notice that `LineEdit` immediately (and correctly) flips the symbols, and the newly-added Arabic letter, to RTL.

**Notes**
- Identical behavior is seen with `TextEdit`.
- The purpose of steps 2-4 are to simulate an Arabic environment when the project is run, despite `OS.get_locale() == "en"` (or your system's current language).

### Minimal reproduction project

[rtlsymbols.zip](https://github.com/godotengine/godot/files/12525509/rtlsymbols.zip)
p_font_data->supported_scripts.clear();
			unsigned int count = hb_ot_layout_table_get_script_tags(hb_face, HB_OT_TAG_GSUB, 0, nullptr, nullptr);
			if (count != 0) {
				hb_tag_t *script_tags = (hb_tag_t *)memalloc(count * sizeof(hb_tag_t));
				hb_ot_layout_table_get_script_tags(hb_face, HB_OT_TAG_GSUB, 0, &count, script_tags);
				for (unsigned int i = 0; i < count; i++) {
					p_font_data->supported_scripts.insert(script_tags[i]);
				}
				memfree(script_tags);
			}
			count = hb_ot_layout_table_get_script_tags(hb_face, HB_OT_TAG_GPOS, 0, nullptr, nullptr);
			if (count != 0) {
				hb_tag_t *script_tags = (hb_tag_t *)memalloc(count * sizeof(hb_tag_t));
				hb_ot_layout_table_get_script_tags(hb_face, HB_OT_TAG_GPOS, 0, &count, script_tags);
				for (unsigned int i = 0; i < count; i++) {
					p_font_data->supported_scripts.insert(script_tags[i]);
				}
				memfree(script_tags);
			}
			
			TT_OS2 *os2 = (TT_OS2 *)FT_Get_Sfnt_Table(fd->face, FT_SFNT_OS2);
			if (os2) {
				if ((os2->ulUnicodeRange1 & 1L << 4) || (os2->ulUnicodeRange1 & 1L << 5) || (os2->ulUnicodeRange1 & 1L << 6) || (os2->ulUnicodeRange1 & 1L << 31) || (os2->ulUnicodeRange2 & 1L << 0) || (os2->ulUnicodeRange2 & 1L << 1) || (os2->ulUnicodeRange2 & 1L << 2) || (os2->ulUnicodeRange2 & 1L << 3) || (os2->ulUnicodeRange2 & 1L << 4) || (os2->ulUnicodeRange2 & 1L << 5) || (os2->ulUnicodeRange2 & 1L << 6) || (os2->ulUnicodeRange2 & 1L << 7) || (os2->ulUnicodeRange2 & 1L << 8) || (os2->ulUnicodeRange2 & 1L << 9) || (os2->ulUnicodeRange2 & 1L << 10) || (os2->ulUnicodeRange2 & 1L << 11) || (os2->ulUnicodeRange2 & 1L << 12) || (os2->ulUnicodeRange2 & 1L << 13) || (os2->ulUnicodeRange2 & 1L << 14) || (os2->ulUnicodeRange2 & 1L << 15) || (os2->ulUnicodeRange2 & 1L << 30) || (os2->ulUnicodeRange3 & 1L << 0) || (os2->ulUnicodeRange3 & 1L << 1) || (os2->ulUnicodeRange3 & 1L << 2) || (os2->ulUnicodeRange3 & 1L << 4) || (os2->ulUnicodeRange3 & 1L << 5) || (os2->ulUnicodeRange3 & 1L << 18) || (os2->ulUnicodeRange3 & 1L << 24) || (os2->ulUnicodeRange3 & 1L << 25) || (os2->ulUnicodeRange3 & 1L << 26) || (os2->ulUnicodeRange3 & 1L << 27) || (os2->ulUnicodeRange3 & 1L << 28) || (os2->ulUnicodeRange4 & 1L << 3) || (os2->ulUnicodeRange4 & 1L << 6) || (os2->ulUnicodeRange4 & 1L << 15) || (os2->ulUnicodeRange4 & 1L << 23) || (os2->ulUnicodeRange4 & 1L << 24) || (os2->ulUnicodeRange4 & 1L << 26)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_COMMON);
				}
				if ((os2->ulUnicodeRange1 & 1L << 0) || (os2->ulUnicodeRange1 & 1L << 1) || (os2->ulUnicodeRange1 & 1L << 2) || (os2->ulUnicodeRange1 & 1L << 3) || (os2->ulUnicodeRange1 & 1L << 29)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_LATIN);
				}
				if ((os2->ulUnicodeRange1 & 1L << 7) || (os2->ulUnicodeRange1 & 1L << 30)) {
					p_font_data->supported_scripts.insert(HB_SCRIPT_GREEK);