Reduce cloning and simplify some iteration #778

Job	Run time
Check toolchain is stable	3s
Build book	15s
QA (lint)	5m 7s
End to end tests (firefox, ubuntu-latest)	1m 32s
QA (check-all-features)	1m 11s
Build example (csr-minimal, stable)	37s
QA (build-all-features)	3m 38s
End to end tests (chrome, ubuntu-latest)	57s
Unit tests	50s
Build example (csr-minimal, nightly)	1m 24s
End to end tests (chrome, macos-latest)	1m 52s
Build example (csr-complete, stable)	31s
End to end tests (firefox, windows-latest)	4m 16s
Build example (csr-complete, nightly)	1m 32s
End to end tests (chrome, windows-latest)	3m 58s
Build example (ssr-hydrate-actix, stable)	34s
Build example (ssr-hydrate-actix, nightly)	1m 10s
Build example (ssr-hydrate-axum, stable)	26s
Build example (ssr-hydrate-axum, nightly)	1m 10s
Build example (system-gtk, stable)	45s
Build example (system-gtk, nightly)	2m 33s
Deploy book	0s
Test leptos-fluent-macros release	0s
Release leptos-fluent-macros	0s
Release leptos-fluent	0s
Create release	0s
	34m 21s

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