### Godot version

v4.0.beta10.official [d0398f62f]

### System information

Windows 10, Vulkan

### Issue description

When I was testing my `debug_draw_3d` extension, I noticed that the graph titles change their size strangely.
For example, here, with a font size of 41 for one of the titles, instead of `fps5` it draws `fps6` with a font size of 14.
But the ascent of the font is taken correctly, which is why the title goes down a lot.
![godot windows editor dev x86_64_u0CvcAfqjh](https://user-images.githubusercontent.com/7782218/209420557-17f32fcc-c64c-44ff-9f08-4a11119d4ac8.gif)

I found that these hashing functions create the same hash for `fps5: 41`, `fps6: 14` and `fps8: 76`.
https://github.com/godotengine/godot/blob/f7cf9fb148140b86ee5795110373a0d55ff32860/scene/resources/font.cpp#L273-L291
https://github.com/godotengine/godot/blob/f7cf9fb148140b86ee5795110373a0d55ff32860/scene/resources/font.cpp#L303-L323
(also both of these parts of the code are repeated 3 times)

Here's what I get in MRP:
![image](https://user-images.githubusercontent.com/7782218/209420974-0cbcbb95-81a9-42e9-a9af-4b71b8715769.png)

Expected something like this:
![image](https://user-images.githubusercontent.com/7782218/209421473-4a019989-f432-40c0-b9af-c40ec969ade8.png)

Affected `Font` methods: `get_string_size`, `get_multiline_string_size`, `draw_string`, `draw_multiline_string`, `draw_string_outline`, `draw_multiline_string_outline`.

### Steps to reproduce

* Open MRP
* Notice the gray rectangles and the text somewhere near them (the text should be on top of the rectangles)
* Move the slider for the `second_font_size` parameter and watch glitches on some values.

Also, if you cache a lot of variants for `second_font_size`, and then change `first_font_size`(or vice versa), then there will be a more glitches:
![Godot_v4 0-beta10_win64_r0jJoStkQd](https://user-images.githubusercontent.com/7782218/209422373-c4ca1238-b351-4cbc-b451-136bbdb4fee0.gif)


### Minimal reproduction project

[Font Bad Hash.zip](https://github.com/godotengine/godot/files/10298021/Font.Bad.Hash.zip)

ADD_PROPERTY(PropertyInfo(Variant::INT, "font_weight", PROPERTY_HINT_RANGE, "100,999,25"), "set_font_weight", "get_font_weight");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "font_stretch", PROPERTY_HINT_RANGE, "50,200,25"), "set_font_stretch", "get_font_stretch");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "antialiasing", PROPERTY_HINT_ENUM, "None,Grayscale,LCD Subpixel", PROPERTY_USAGE_STORAGE), "set_antialiasing", "get_antialiasing");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "generate_mipmaps"), "set_generate_mipmaps", "get_generate_mipmaps");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "allow_system_fallback"), "set_allow_system_fallback", "is_allow_system_fallback");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "force_autohinter"), "set_force_autohinter", "is_force_autohinter");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "hinting", PROPERTY_HINT_ENUM, "None,Light,Normal"), "set_hinting", "get_hinting");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "subpixel_positioning", PROPERTY_HINT_ENUM, "Disabled,Auto,One Half of a Pixel,One Quarter of a Pixel"), "set_subpixel_positioning", "get_subpixel_positioning");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "multichannel_signed_distance_field"), "set_multichannel_signed_distance_field", "is_multichannel_signed_distance_field");
	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "oversampling", PROPERTY_HINT_RANGE, "0,10,0.1"), "set_oversampling", "get_oversampling");
	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "fallbacks", PROPERTY_HINT_ARRAY_TYPE, MAKE_RESOURCE_TYPE_HINT("Font")), "set_fallbacks", "get_fallbacks");
}
void SystemFont::_update_rids() const {
	Ref<Font> f = _get_base_font_or_default();
	rids.clear();
	if (fallbacks.is_empty() && f.is_valid()) {
		RID rid = _get_rid();
		if (rid.is_valid()) {
			rids.push_back(rid);
		}
		const TypedArray<Font> &base_fallbacks = f->get_fallbacks();
		for (int i = 0; i < base_fallbacks.size(); i++) {
			_update_rids_fb(base_fallbacks[i], 0);
		}
	} else {
		_update_rids_fb(const_cast<SystemFont *>(this), 0);
	}
	dirty_rids = false;
}
void SystemFont::_update_base_font() {