Goals: fix remaining funds calculation

[youngcw]

Fixes #1409. This makes the template processing not include previously budgeted funds in the return value.

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Files count	Total bundle size	% Changed
16	2.08 MB	0%

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Asset	File Size	% Changed
static/js/main.js	848.52 KB	0%
static/js/457.chunk.js	388.22 KB	0%
static/media/Inter-italic.var.woff2	239.29 KB	0%
static/media/Inter-roman.var.woff2	221.86 KB	0%
static/js/wide-components.chunk.js	159.28 KB	0%
static/js/383.chunk.js	117.35 KB	0%
static/js/reports.chunk.js	32.25 KB	0%
static/js/narrow-components.chunk.js	31.94 KB	0%
static/js/281.chunk.js	28.55 KB	0%
static/js/876.chunk.js	26.2 KB	0%
static/js/969.chunk.js	12.94 KB	0%
static/js/resize-observer-polyfill.chunk.js	8.12 KB	0%
static/css/main.css	5.82 KB	0%
asset-manifest.json	2.07 KB	0%
index.html	1.66 KB	0%
static/media/browser-server.js	963 B	0%

[github-actions]

Bundle Stats - loot-core

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Files count	Total bundle size	% Changed
2	1.97 MB -> 1.97 MB (+3 B)	+0.00%

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File	Δ	Size
packages/loot-core/src/server/budget/goaltemplates.ts	📈 +27 B (+0.12%)	22.4 KB -> 22.43 KB

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kcab.worker.js	1010.37 KB -> 1010.37 KB (+3 B)	+0.00%

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xfo.xfo.kcab.worker.js	1004.04 KB	0%

[j-f1]

Same here — feel free to merge!