Fix #2043: use formvalue instead of String for forms #5143

Job	Run time
Clippy	2m 24s
Clippy	2m 24s
Rustfmt	22s
Rustfmt	22s
matrix_test (x86_64-pc-windows-msvc, windows-latest, 1.75.0, false, test, --all --tests)	7m 10s
matrix_test (x86_64-pc-windows-msvc, windows-latest, 1.75.0, false, test, --all --tests)	7m 4s
Check	1m 36s
Check	1m 36s
matrix_test (x86_64-apple-darwin, macos-latest, 1.75.0, false, test, --all --tests)	4m 15s
matrix_test (x86_64-apple-darwin, macos-latest, 1.75.0, false, test, --all --tests)	4m 15s
matrix_test (aarch64-apple-ios, macos-latest, 1.75.0, false, build, --package dioxus-mobile)	1m 15s
matrix_test (aarch64-apple-ios, macos-latest, 1.75.0, false, build, --package dioxus-mobile)	1m 15s
Test Suite	6m 14s
Test Suite	6m 14s
matrix_test (aarch64-linux-android, ubuntu-latest, 1.75.0, true, build, --package dioxus-mobile)	3m 56s
matrix_test (aarch64-linux-android, ubuntu-latest, 1.75.0, true, build, --package dioxus-mobile)	3m 56s
Playwright Tests	7m 29s
Playwright Tests	7m 29s
	1h 9m 16s

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