feat: default enable allowDynamicBackends with better unsupported errors #4795

Job	Run time
shellcheck	5s
check-changelog	10s
check-docusaurus	2m 24s
Ensure that all required "cargo install" commands are run, or we have a cache hit (viceroy, 0.12.0)	3s
format	22s
Ensure that all required "cargo install" commands are run, or we have a cache hit (wasm-tools, 1....	2s
Debug Build	2m 14s
Build (release)	2m 13s
Build (weval)	2m 13s
sdktest-debug	1s
Run Web Platform Tests Debug	1s
test-npm-package	1s
sdktest	1s
Run Web Platform Tests	1s
	9m 51s

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